2490F–AVR–12/03
Features
• High-performance, Low-power AVR® 8-bit Microcontroller
• Advanced RISC Architecture
– 130 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers + Peripheral Control Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16 MHz
– On-chip 2-cycle Multiplier
• Non-volatile Program and Data Memories
– 64K Bytes of In-System Reprogrammable Flash
Endurance: 10,000 Write/Erase Cycles
– Optional Boot Code Section with Independent Lock Bits
In-System Programming by On-chip Boot Program
True Read-While-Write Operation
– 2K Bytes EEPROM
Endurance: 100,000 Write/Erase Cycles
– 4K Bytes Internal SRAM
– Up to 64K Bytes Optional External Memory Space
– Programming Lock for Software Security
– SPI Interface for In-System Programming
• JTAG (IEEE std. 1149.1 Compliant) Interface
– Boundary-scan Capabilities According to the JTAG Standard
– Extensive On-chip Debug Support
– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
• Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
– Two Expanded 16-bit Timer/Counters with Separate Prescaler, Compare Mode, and
Capture Mode
– Real Time Counter with Separate Oscillator
– Two 8-bit PWM Channels
– 6 PWM Channels with Programmable Resolution from 1 to 16 Bits
– 8-channel, 10-bit ADC
8 Single-ended Channels
7 Differential Channels
2 Differential Channels with Programmable Gain (1x, 10x, 200x)
– Byte-oriented Two-wire Serial Interface
– Dual Programmable Serial USARTs
– Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with On-chip Oscillator
– On-chip Analog Comparator
• Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated RC Oscillator
– External and Internal Interrupt Sources
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby
and Extended Standby
– Software Selectable Clock Frequency
– ATmega103 Compatibility Mode Selected by a Fuse
– Global Pull-up Disable
• I/O and Packages
– 53 Programmable I/O Lines
– 64-lead TQFP and 64-pad MLF
• Operating Voltages
– 2.7 - 5.5V for ATmega64L
– 4.5 - 5.5V for ATmega64
• Speed Grades
– 0 - 8 MHz for ATmega64L
– 0 - 16 MHz for ATmega64
8-bit
Microcontroller
with 64K Bytes
In-System
Programmable
Flash
ATmega64
ATmega64L
Preliminary
2 ATmega64(L)
2490F–AVR–12/03
Pin Configuration Figure 1. Pinout ATmega64
Disclaimer Typical values contained in this data sheet are based on simulations and characterization
of other AVR microcontrollers manufactured on the same process technology. Min
and Max values will be available after the device is characterized.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
PEN
RXD0/(PDI) PE0
(TXD0/PDO) PE1
(XCK0/AIN0) PE2
(OC3A/AIN1) PE3
(OC3B/INT4) PE4
(OC3C/INT5) PE5
(T3/INT6) PE6
(IC3/INT7) PE7
(SS) PB0
(SCK) PB1
(MOSI) PB2
(MISO) PB3
(OC0) PB4
(OC1A) PB5
(OC1B) PB6
PA3 (AD3)
PA4 (AD4)
PA5 (AD5)
PA6 (AD6)
PA7 (AD7)
PG2(ALE)
PC7 (A15)
PC6 (A14)
PC5 (A13)
PC4 (A12)
PC3 (A11)
PC2 (A10
PC1 (A9)
PC0 (A8)
PG1(RD)
PG0(WR)
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
(OC2/OC1C) PB7
TOSC2/PG3
TOSC1/PG4
RESET
VCC
GND
XTAL2
XTAL1
(SCL/INT0) PD0
(SDA/INT1) PD1
(RXD1/INT2) PD2
(TXD1/INT3) PD3
(IC1) PD4
(XCK1) PD5
(T1) PD6
(T2) PD7
AVCC
GND
AREF
PF0 (ADC0)
PF1 (ADC1)
PF2 (ADC2)
PF3 (ADC3)
PF4 (ADC4/TCK)
PF5 (ADC5/TMS)
PF6 (ADC6/TDO)
PF7 (ADC7/TDI)
GND
VCC
PA0 (AD0)
PA1 (AD1)
PA2 (AD2)
TQFP/MLF
3
ATmega64(L)
2490F–AVR–12/03
Overview
The ATmega64 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing
powerful instructions in a single clock cycle, the ATmega64 achieves throughputs approaching 1 MIPS per MHz, allowing
the system designer to optimize power consumption versus processing speed.
Block Diagram
Figure 2. Block Diagram
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly
connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction
executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times
faster than conventional CISC microcontrollers.
PROGRAM
COUNTER
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
STACK
POINTER
PROGRAM
FLASH
MCU CONTROL
REGISTER
SRAM
GENERAL
PURPOSE
REGISTERS
INSTRUCTION
REGISTER
TIMER/
COUNTERS
INSTRUCTION
DECODER
DATA DIR.
REG. PORTB
DATA DIR.
REG. PORTE
DATA DIR.
REG. PORTA
DATA DIR.
REG. PORTD
DATA REGISTER
PORTB
DATA REGISTER
PORTE
DATA REGISTER
PORTA
DATA REGISTER
PORTD
TIMING AND
CONTROL
OSCILLATOR
OSCILLATOR
INTERRUPT
UNIT
EEPROM
USART0 SPI
STATUS
REGISTER
Z
Y
X
ALU
PORTE DRIVERS PORTB DRIVERS
PORTF DRIVERS PORTA DRIVERS
PORTD DRIVERS
PORTC DRIVERS
PE0 - PE7 PB0 - PB7
PF0 - PF7 PA0 - PA7
RESET
VCC
AGND
GND
AREF
XTAL1
XTAL2
CONTROL
LINES
+
-
ANALOG
COMPARATOR
PC0 - PC7
8-BIT DATA BUS
AVCC
USART1
CALIB. OSC
DATA DIR.
REG. PORTC
DATA REGISTER
PORTC
ON-CHIP DEBUG
JTAG TAP
PROGRAMMING
PEN LOGIC
BOUNDARYSCAN
DATA DIR.
REG. PORTF
DATA REGISTER
PORTF
ADC
PD0 - PD7
DATA DIR.
REG. PORTG
DATA REG.
PORTG
PORTG DRIVERS
PG0 - PG4
2-WIRE SERIAL
INTERFACE
4 ATmega64(L)
2490F–AVR–12/03
The ATmega64 provides the following features: 64K bytes of In-System Programmable
Flash with Read-While-Write capabilities, 2K bytes EEPROM, 4K bytes SRAM, 53 general
purpose I/O lines, 32 general purpose working registers, Real Time Counter (RTC),
four flexible Timer/Counters with compare modes and PWM, two USARTs, a byte oriented
Two-wire Serial Interface, an 8-channel, 10-bit ADC with optional differential input
stage with programmable gain, programmable Watchdog Timer with internal Oscillator,
an SPI serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for
accessing the On-chip Debug system and programming, and six software selectable
power saving modes. The Idle mode stops the CPU while allowing the SRAM,
Timer/Counters, SPI port, and interrupt system to continue functioning. The Powerdown
mode saves the register contents but freezes the Oscillator, disabling all other
chip functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous
timer continues to run, allowing the user to maintain a timer base while the
rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all
I/O modules except asynchronous timer and ADC, to minimize switching noise during
ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the
rest of the device is sleeping. This allows very fast start-up combined with low power
consumption. In Extended Standby mode, both the main Oscillator and the asynchronous
timer continue to run.
The device is manufactured using Atmel’s high-density non-volatile memory technology.
The On-chip ISP Flash allows the program memory to be reprogrammed In-System
through an SPI serial interface, by a conventional non-volatile memory programmer, or
by an On-chip Boot program running on the AVR core. The Boot Program can use any
interface to download the Application Program in the Application Flash memory. Software
in the Boot Flash section will continue to run while the Application Flash section is
updated, providing true Read-While-Write operation. By combining an 8-bit RISC CPU
with In-System Self-Programmable Flash on a monolithic chip, the Atmel ATmega64 is
a powerful microcontroller that provides a highly-flexible and cost-effective solution to
many embedded control applications.
The ATmega64 AVR is supported with a full suite of program and system development
tools including: C compilers, macro assemblers, program debugger/simulators, In-Circuit
Emulators, and evaluation kits.
ATmega103 and
ATmega64 Compatibility
The ATmega64 is a highly complex microcontroller where the number of I/O locations
supersedes the 64 I/O location reserved in the AVR instruction set. To ensure backward
compatibility with the ATmega103, all I/O locations present in ATmega103 have the
same location in ATmega64. Most additional I/O locations are added in an Extended I/O
space starting from 0x60 to 0xFF (i.e., in the ATmega103 internal RAM space). These
location can be reached by using LD/LDS/LDD and ST/STS/STD instructions only, not
by using IN and OUT instructions. The relocation of the internal RAM space may still be
a problem for ATmega103 users. Also, the increased number of Interrupt Vectors might
be a problem if the code uses absolute addresses. To solve these problems, an
ATmega103 compatibility mode can be selected by programming the fuse M103C. In
this mode, none of the functions in the Extended I/O space are in use, so the internal
RAM is located as in ATmega103. Also, the extended Interrupt Vectors are removed.
The ATmega64 is 100% pin compatible with ATmega103, and can replace the
ATmega103 on current printed circuit boards. The application note “Replacing
ATmega103 by ATmega64” describes what the user should be aware of replacing the
ATmega103 by an ATmega64.
5
ATmega64(L)
2490F–AVR–12/03
ATmega103 Compatibility
Mode
By programming the M103C Fuse, the ATmega64 will be compatible with the
ATmega103 regards to RAM, I/O pins and Interrupt Vectors as described above. However,
some new features in ATmega64 are not available in this compatibility mode,
these features are listed below:
• One USART instead of two, asynchronous mode only. Only the eight least
significant bits of the Baud Rate Register is available.
• One 16 bits Timer/Counter with two compare registers instead of two 16 bits
Timer/Counters with three compare registers.
• Two-wire serial interface is not supported.
• Port G serves alternate functions only (not a general I/O port).
• Port F serves as digital input only in addition to analog input to the ADC.
• Boot Loader capabilities is not supported.
• It is not possible to adjust the frequency of the internal calibrated RC Oscillator.
• The External Memory Interface can not release any Address pins for general I/O,
neither configure different wait states to different External Memory Address
sections.
• Only EXTRF and PORF exist in the MCUCSR Register.
• No timed sequence is required for Watchdog Timeout change.
• Only low-level external interrupts can be used on four of the eight External Interrupt
sources.
• Port C is output only.
• USART has no FIFO buffer, so Data OverRun comes earlier.
• The user must have set unused I/O bits to 0 in ATmega103 programs.
Pin Descriptions
VCC Digital supply voltage.
GND Ground.
Port A (PA7..PA0) Port A is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port A output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port A pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port A pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port A also serves the functions of various special features of the ATmega64 as listed
on page 71.
Port B (PB7..PB0) Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port B output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port B pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port B pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port B also serves the functions of various special features of the ATmega64 as listed
on page 72.
6 ATmega64(L)
2490F–AVR–12/03
Port C (PC7..PC0) Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port C output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port C pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port C pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port C also serves the functions of special features of the ATmega64 as listed on page
75. In ATmega103 compatibility mode, Port C is output only, and the port C pins are not
tri-stated when a reset condition becomes active.
Port D (PD7..PD0) Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port D output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port D pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port D pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port D also serves the functions of various special features of the ATmega64 as listed
on page 76.
Port E (PE7..PE0) Port E is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port E output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port E pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port E pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port E also serves the functions of various special features of the ATmega64 as listed
on page 79.
Port F (PF7..PF0) Port F serves as the analog inputs to the A/D Converter.
Port F also serves as an 8-bit bi-directional I/O port, if the A/D Converter is not used.
Port pins can provide internal pull-up resistors (selected for each bit). The Port F output
buffers have symmetrical drive characteristics with both high sink and source capability.
As inputs, Port F pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port F pins are tri-stated when a reset condition becomes
active, even if the clock is not running. If the JTAG interface is enabled, the pull-up resistors
on pins PF7(TDI), PF5(TMS) and PF4(TCK) will be activated even if a reset occurs.
The TDO pin is tri-stated unless TAP states that shift out data are entered.
Port F also serves the functions of the JTAG interface.
In ATmega103 compatibility mode, Port F is an input port only.
Port G (PG4..PG0) Port G is a 5-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port G output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port G pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port G pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port G also serves the functions of various special features.
In ATmega103 compatibility mode, these pins only serves as strobes signals to the
external memory as well as input to the 32 kHz Oscillator, and the pins are initialized to
PG0 = 1, PG1 = 1, and PG2 = 0 asynchronously when a reset condition becomes
active, even if the clock is not running. PG3 and PG4 are Oscillator pins.
7
ATmega64(L)
2490F–AVR–12/03
RESET Reset input. A low level on this pin for longer than the minimum pulse length will generate
a reset, even if the clock is not running. The minimum pulse length is given in Table
19 on page 50. Shorter pulses are not guaranteed to generate a reset.
XTAL1 Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.
XTAL2 Output from the inverting Oscillator amplifier.
AVCC AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally
connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected
to VCC through a low-pass filter.
AREF AREF is the analog reference pin for the A/D Converter.
PEN This is a programming enable pin for the SPI Serial Programming mode. By holding this
pin low during a Power-on Reset, the device will enter the SPI Serial Programming
mode. PEN has no function during normal operation.
8 ATmega64(L)
2490F–AVR–12/03
Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
(0xFF) Reserved – – – – – – – –
.. Reserved – – – – – – – –
(0x9E) Reserved – – – – – – – –
(0x9D) UCSR1C – UMSEL1 UPM11 UPM10 USBS1 UCSZ11 UCSZ10 UCPOL1 189
(0x9C) UDR1 USART1 I/O Data Register 186
(0x9B) UCSR1A RXC1 TXC1 UDRE1 FE1 DOR1 UPE1 U2X1 MPCM1 187
(0x9A) UCSR1B RXCIE1 TXCIE1 UDRIE1 RXEN1 TXEN1 UCSZ12 RXB81 TXB81 188
(0x99) UBRR1L USART1 Baud Rate Register Low 191
(0x98) UBRR1H – – – – USART1 Baud Rate Register High 191
(0x97) Reserved – – – – – – – –
(0x96) Reserved – – – – – – – –
(0x95) UCSR0C – UMSEL0 UPM01 UPM00 USBS0 UCSZ01 UCSZ00 UCPOL0 189
(0x94) Reserved – – – – – – – –
(0x93) Reserved – – – – – – – –
(0x92) Reserved – – – – – – – –
(0x91) Reserved – – – – – – – –
(0x90) UBRR0H – – – – USART0 Baud Rate Register High 191
(0x8F) Reserved – – – – – – – –
(0x8E) ADCSRB – – – – – ADTS2 ADTS1 ADTS0 247
(0x8D) Reserved – – – – – – – –
(0x8C) TCCR3C FOC3A FOC3B FOC3C – – – – – 136
(0x8B) TCCR3A COM3A1 COM3A0 COM3B1 COM3B0 COM3C1 COM3C0 WGM31 WGM30 131
(0x8A) TCCR3B ICNC3 ICES3 – WGM33 WGM32 CS32 CS31 CS30 134
(0x89) TCNT3H Timer/Counter3 – Counter Register High Byte 136
(0x88) TCNT3L Timer/Counter3 – Counter Register Low Byte 136
(0x87) OCR3AH Timer/Counter3 – Output Compare Register A High Byte 137
(0x86) OCR3AL Timer/Counter3 – Output Compare Register A Low Byte 137
(0x85) OCR3BH Timer/Counter3 – Output Compare Register B High Byte 137
(0x84) OCR3BL Timer/Counter3 – Output Compare Register B Low Byte 137
(0x83) OCR3CH Timer/Counter3 – Output Compare Register C High Byte 137
(0x82) OCR3CL Timer/Counter3 – Output Compare Register C Low Byte 137
(0x81) ICR3H Timer/Counter3 – Input Capture Register High Byte 138
(0x80) ICR3L Timer/Counter3 – Input Capture Register Low Byte 138
(0x7F) Reserved – – – – – – – –
(0x7E) Reserved – – – – – – – –
(0x7D) ETIMSK – – TICIE3 OCIE3A OCIE3B TOIE3 OCIE3C OCIE1C 139
(0x7C) ETIFR – – ICF3 OCF3A OCF3B TOV3 OCF3C OCF1C 140
(0x7B) Reserved – – – – – – – –
(0x7A) TCCR1C FOC1A FOC1B FOC1C – – – – – 135
(0x79) OCR1CH Timer/Counter1 – Output Compare Register C High Byte 137
(0x78) OCR1CL Timer/Counter1 – Output Compare Register C Low Byte 137
(0x77) Reserved – – – – – – – –
(0x76) Reserved – – – – – – – –
(0x75) Reserved – – – – – – – –
(0x74) TWCR TWINT TWEA TWSTA TWSTO TWWC TWEN – TWIE 205
(0x73) TWDR Two-wire Serial Interface Data Register 207
(0x72) TWAR TWA6 TWA5 TWA4 TWA3 TWA2 TWA1 TWA0 TWGCE 207
(0x71) TWSR TWS7 TWS6 TWS5 TWS4 TWS3 – TWPS1 TWPS0 206
(0x70) TWBR Two-wire Serial Interface Bit Rate Register 205
(0x6F) OSCCAL Oscillator Calibration Register 40
(0x6E) Reserved – – – – – – – –
(0x6D) XMCRA – SRL2 SRL1 SRL0 SRW01 SRW00 SRW11 30
(0x6C) XMCRB XMBK – – – – XMM2 XMM1 XMM0 32
(0x6B) Reserved – – – – – – – –
(0x6A) EICRA ISC31 ISC30 ISC21 ISC20 ISC11 ISC10 ISC01 ISC00 88
(0x69) Reserved – – – – – – – –
(0x68) SPMCSR SPMIE RWWSB – RWWSRE BLBSET PGWRT PGERS SPMEN 281
(0x67) Reserved – – – – – – – –
(0x66) Reserved – – – – – – – –
(0x65) PORTG – – – PORTG4 PORTG3 PORTG2 PORTG1 PORTG0 87
(0x64) DDRG – – – DDG4 DDG3 DDG2 DDG1 DDG0 87
(0x63) PING – – – PING4 PING3 PING2 PING1 PING0 87
(0x62) PORTF PORTF7 PORTF6 PORTF5 PORTF4 PORTF3 PORTF2 PORTF1 PORTF0 86
(0x61) DDRF DDF7 DDF6 DDF5 DDF4 DDF3 DDF2 DDF1 DDF0 87
9
ATmega64(L)
2490F–AVR–12/03
(0x60) Reserved – – – – – – – –
0x3F (0x5F) SREG I T H S V N Z C 10
0x3E (0x5E) SPH SP15 SP14 SP13 SP12 SP11 SP10 SP9 SP8 12
0x3D (0x5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 12
0x3C (0x5C) XDIV XDIVEN XDIV6 XDIV5 XDIV4 XDIV3 XDIV2 XDIV1 XDIV0 43
0x3B (0x5B) Reserved – – – – – – – –
0x3A (0x5A) EICRB ISC71 ISC70 ISC61 ISC60 ISC51 ISC50 ISC41 ISC40 89
0x39 (0x59) EIMSK INT7 INT6 INT5 INT4 INT3 INT2 INT1 INT0 90
0x38 (0x58) EIFR INTF7 INTF6 INTF5 INTF4 INTF3 INTF INTF1 INTF0 90
0x37 (0x57) TIMSK OCIE2 TOIE2 TICIE1 OCIE1A OCIE1B TOIE1 OCIE0 TOIE0 107, 138, 158
0x36 (0x56) TIFR OCF2 TOV2 ICF1 OCF1A OCF1B TOV1 OCF0 TOV0 107, 140, 158
0x35 (0x55) MCUCR SRE SRW10 SE SM1 SM0 SM2 IVSEL IVCE 30, 44, 62
0x34 (0x54) MCUCSR JTD – – JTRF WDRF BORF EXTRF PORF 53, 256
0x33 (0x53) TCCR0 FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00 102
0x32 (0x52) TCNT0 Timer/Counter0 (8 Bit) 104
0x31 (0x51) OCR0 Timer/Counter0 Output Compare Register 104
0x30 (0x50) ASSR – – – – AS0 TCN0UB OCR0UB TCR0UB 105
0x2F (0x4F) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 COM1C1 COM1C0 WGM11 WGM10 131
0x2E (0x4E) TCCR1B ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 134
0x2D (0x4D) TCNT1H Timer/Counter1 – Counter Register High Byte 136
0x2C (0x4C) TCNT1L Timer/Counter1 – Counter Register Low Byte 136
0x2B (0x4B) OCR1AH Timer/Counter1 – Output Compare Register A High Byte 137
0x2A (0x4A) OCR1AL Timer/Counter1 – Output Compare Register A Low Byte 137
0x29 (0x49) OCR1BH Timer/Counter1 – Output Compare Register B High Byte 137
0x28 (0x48) OCR1BL Timer/Counter1 – Output Compare Register B Low Byte 137
0x27 (0x47) ICR1H Timer/Counter1 – Input Capture Register High Byte 138
0x26 (0x46) ICR1L Timer/Counter1 – Input Capture Register Low Byte 138
0x25 (0x45) TCCR2 FOC2 WGM20 COM21 COM20 WGM21 CS22 CS21 CS20 155
0x24 (0x44) TCNT2 Timer/Counter2 (8 Bit) 157
0x23 (0x43) OCR2 Timer/Counter2 Output Compare Register 158
0x22 (0x42) OCDR
IDRD/
OCDR7 OCDR6 OCDR5 OCDR4 OCDR3 OCDR2 OCDR1 OCDR0 253
0x21 (0x41) WDTCR – – – WDCE WDE WDP2 WDP1 WDP0 55
0x20 (0x40) SFIOR TSM – – – ACME PUD PSR0 PSR321 70, 109, 143, 227
0x1F (0x3F) EEARH – – – – – EEPROM Address Register High Byte 20
0x1E (0x3E) EEARL EEPROM Address Register Low Byte 20
0x1D (0x3D) EEDR EEPROM Data Register 20
0x1C (0x3C) EECR – – – – EERIE EEMWE EEWE EERE 20
0x1B (0x3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 85
0x1A (0x3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 85
0x19 (0x39) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 85
0x18 (0x38) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 85
0x17 (0x37) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 85
0x16 (0x36) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 85
0x15 (0x35) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 85
0x14 (0x34) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 85
0x13 (0x33) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 86
0x12 (0x32) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 86
0x11 (0x31) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 86
0x10 (0x30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 86
0x0F (0x2F) SPDR SPI Data Register 167
0x0E (0x2E) SPSR SPIF WCOL – – – – – SPI2X 167
0x0D (0x2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 165
0x0C (0x2C) UDR0 USART0 I/O Data Register 186
0x0B (0x2B) UCSR0A RXC0 TXC0 UDRE0 FE0 DOR0 UPE0 U2X0 MPCM0 187
0x0A (0x2A) UCSR0B RXCIE0 TXCIE0 UDRIE0 RXEN0 TXEN0 UCSZ02 RXB80 TXB80 188
0x09 (0x29) UBRR0L USART0 Baud Rate Register Low 191
0x08 (0x28) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 228
0x07 (0x27) ADMUX REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0 243
0x06 (0x26) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 245
0x05 (0x25) ADCH ADC Data Register High Byte 246
0x04 (0x24) ADCL ADC Data Register Low byte 246
0x03 (0x23) PORTE PORTE7 PORTE6 PORTE5 PORTE4 PORTE3 PORTE2 PORTE1 PORTE0 86
0x02 (0x22) DDRE DDE7 DDE6 DDE5 DDE4 DDE3 DDE2 DDE1 DDE0 86
0x01 (0x21) PINE PINE7 PINE6 PINE5 PINE4 PINE3 PINE2 PINE1 PINE0 86
Register Summary (Continued)
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
10 ATmega64(L)
2490F–AVR–12/03
Notes: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
should never be written.
2. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on
all bits in the I/O Register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions
work with registers 0x00 to 0x1F only.
0x00 (0x20) PINF PINF7 PINF6 PINF5 PINF4 PINF3 PINF2 PINF1 PINF0 87
Register Summary (Continued)
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
11
ATmega64(L)
2490F–AVR–12/03
Instruction Set Summary
Mnemonics Operands Description Operation Flags #Clocks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD Rd, Rr Add two Registers Rd ← Rd + Rr Z,C,N,V,H 1
ADC Rd, Rr Add with Carry two Registers Rd ← Rd + Rr + C Z,C,N,V,H 1
ADIW Rdl,K Add Immediate to Word Rdh:Rdl ← Rdh:Rdl + K Z,C,N,V,S 2
SUB Rd, Rr Subtract two Registers Rd ← Rd - Rr Z,C,N,V,H 1
SUBI Rd, K Subtract Constant from Register Rd ← Rd - K Z,C,N,V,H 1
SBC Rd, Rr Subtract with Carry two Registers Rd ← Rd - Rr - C Z,C,N,V,H 1
SBCI Rd, K Subtract with Carry Constant from Reg. Rd ← Rd - K - C Z,C,N,V,H 1
SBIW Rdl,K Subtract Immediate from Word Rdh:Rdl ← Rdh:Rdl - K Z,C,N,V,S 2
AND Rd, Rr Logical AND Registers Rd ← Rd • Rr Z,N,V 1
ANDI Rd, K Logical AND Register and Constant Rd ← Rd • K Z,N,V 1
OR Rd, Rr Logical OR Registers Rd ← Rd v Rr Z,N,V 1
ORI Rd, K Logical OR Register and Constant Rd ← Rd v K Z,N,V 1
EOR Rd, Rr Exclusive OR Registers Rd ← Rd ⊕ Rr Z,N,V 1
COM Rd One’s Complement Rd ← 0xFF − Rd Z,C,N,V 1
NEG Rd Two’s Complement Rd ← 0x00 − Rd Z,C,N,V,H 1
SBR Rd,K Set Bit(s) in Register Rd ← Rd v K Z,N,V 1
CBR Rd,K Clear Bit(s) in Register Rd ← Rd • (0xFF - K) Z,N,V 1
INC Rd Increment Rd ← Rd + 1 Z,N,V 1
DEC Rd Decrement Rd ← Rd − 1 Z,N,V 1
TST Rd Test for Zero or Minus Rd ← Rd • Rd Z,N,V 1
CLR Rd Clear Register Rd ← Rd ⊕ Rd Z,N,V 1
SER Rd Set Register Rd ← 0xFF None 1
MUL Rd, Rr Multiply Unsigned R1:R0 ← Rd x Rr Z,C 2
MULS Rd, Rr Multiply Signed R1:R0 ← Rd x Rr Z,C 2
MULSU Rd, Rr Multiply Signed with Unsigned R1:R0 ← Rd x Rr Z,C 2
FMUL Rd, Rr Fractional Multiply Unsigned R1:R0 ¨ (Rd x Rr) << 1 Z,C 2
FMULS Rd, Rr Fractional Multiply Signed R1:R0 ¨ (Rd x Rr) << 1 Z,C 2
FMULSU Rd, Rr Fractional Multiply Signed with Unsigned R1:R0 ¨ (Rd x Rr) << 1 Z,C 2
BRANCH INSTRUCTIONS
RJMP k Relative Jump PC ← PC + k + 1 None 2
IJMP Indirect Jump to (Z) PC ← Z None 2
JMP k Direct Jump PC ← k None 3
RCALL k Relative Subroutine Call PC ← PC + k + 1 None 3
ICALL Indirect Call to (Z) PC ← Z None 3
CALL k Direct Subroutine Call PC ← k None 4
RET Subroutine Return PC ← STACK None 4
RETI Interrupt Return PC ← STACK I 4
CPSE Rd,Rr Compare, Skip if Equal if (Rd = Rr) PC ← PC + 2 or 3 None 1/2/3
CP Rd,Rr Compare Rd − Rr Z, N,V,C,H 1
CPC Rd,Rr Compare with Carry Rd − Rr − C Z, N,V,C,H 1
CPI Rd,K Compare Register with Immediate Rd − K Z, N,V,C,H 1
SBRC Rr, b Skip if Bit in Register Cleared if (Rr(b)=0) PC ← PC + 2 or 3 None 1/2/3
SBRS Rr, b Skip if Bit in Register is Set if (Rr(b)=1) PC ← PC + 2 or 3 None 1/2/3
SBIC P, b Skip if Bit in I/O Register Cleared if (P(b)=0) PC ← PC + 2 or 3 None 1/2/3
SBIS P, b Skip if Bit in I/O Register is Set if (P(b)=1) PC ← PC + 2 or 3 None 1/2/3
BRBS s, k Branch if Status Flag Set if (SREG(s) = 1) then PC←PC+k + 1 None 1/2
BRBC s, k Branch if Status Flag Cleared if (SREG(s) = 0) then PC←PC+k + 1 None 1/2
BREQ k Branch if Equal if (Z = 1) then PC ← PC + k + 1 None 1/2
BRNE k Branch if Not Equal if (Z = 0) then PC ← PC + k + 1 None 1/2
BRCS k Branch if Carry Set if (C = 1) then PC ← PC + k + 1 None 1/2
BRCC k Branch if Carry Cleared if (C = 0) then PC ← PC + k + 1 None 1/2
BRSH k Branch if Same or Higher if (C = 0) then PC ← PC + k + 1 None 1/2
BRLO k Branch if Lower if (C = 1) then PC ← PC + k + 1 None 1/2
BRMI k Branch if Minus if (N = 1) then PC ← PC + k + 1 None 1/2
BRPL k Branch if Plus if (N = 0) then PC ← PC + k + 1 None 1/2
BRGE k Branch if Greater or Equal, Signed if (N ⊕ V= 0) then PC ← PC + k + 1 None 1/2
BRLT k Branch if Less Than Zero, Signed if (N ⊕ V= 1) then PC ← PC + k + 1 None 1/2
BRHS k Branch if Half Carry Flag Set if (H = 1) then PC ← PC + k + 1 None 1/2
BRHC k Branch if Half Carry Flag Cleared if (H = 0) then PC ← PC + k + 1 None 1/2
BRTS k Branch if T Flag Set if (T = 1) then PC ← PC + k + 1 None 1/2
BRTC k Branch if T Flag Cleared if (T = 0) then PC ← PC + k + 1 None 1/2
BRVS k Branch if Overflow Flag is Set if (V = 1) then PC ← PC + k + 1 None 1/2
BRVC k Branch if Overflow Flag is Cleared if (V = 0) then PC ← PC + k + 1 None 1/2
12 ATmega64(L)
2490F–AVR–12/03
BRIE k Branch if Interrupt Enabled if ( I = 1) then PC ← PC + k + 1 None 1/2
BRID k Branch if Interrupt Disabled if ( I = 0) then PC ← PC + k + 1 None 1/2
DATA TRANSFER INSTRUCTIONS
MOV Rd, Rr Move Between Registers Rd ← Rr None 1
MOVW Rd, Rr Copy Register Word Rd+1:Rd ← Rr+1:Rr None 1
LDI Rd, K Load Immediate Rd ← K None 1
LD Rd, X Load Indirect Rd ← (X) None 2
LD Rd, X+ Load Indirect and Post-Inc. Rd ← (X), X ← X + 1 None 2
LD Rd, - X Load Indirect and Pre-Dec. X ← X - 1, Rd ← (X) None 2
LD Rd, Y Load Indirect Rd ← (Y) None 2
LD Rd, Y+ Load Indirect and Post-Inc. Rd ← (Y), Y ← Y + 1 None 2
LD Rd, - Y Load Indirect and Pre-Dec. Y ← Y - 1, Rd ← (Y) None 2
LDD Rd,Y+q Load Indirect with Displacement Rd ← (Y + q) None 2
LD Rd, Z Load Indirect Rd ← (Z) None 2
LD Rd, Z+ Load Indirect and Post-Inc. Rd ← (Z), Z ← Z+1 None 2
LD Rd, -Z Load Indirect and Pre-Dec. Z ← Z - 1, Rd ← (Z) None 2
LDD Rd, Z+q Load Indirect with Displacement Rd ← (Z + q) None 2
LDS Rd, k Load Direct from SRAM Rd ← (k) None 2
ST X, Rr Store Indirect (X) ← Rr None 2
ST X+, Rr Store Indirect and Post-Inc. (X) ← Rr, X ← X + 1 None 2
ST - X, Rr Store Indirect and Pre-Dec. X ← X - 1, (X) ← Rr None 2
ST Y, Rr Store Indirect (Y) ← Rr None 2
ST Y+, Rr Store Indirect and Post-Inc. (Y) ← Rr, Y ← Y + 1 None 2
ST - Y, Rr Store Indirect and Pre-Dec. Y ← Y - 1, (Y) ← Rr None 2
STD Y+q,Rr Store Indirect with Displacement (Y + q) ← Rr None 2
ST Z, Rr Store Indirect (Z) ← Rr None 2
ST Z+, Rr Store Indirect and Post-Inc. (Z) ← Rr, Z ← Z + 1 None 2
ST -Z, Rr Store Indirect and Pre-Dec. Z ← Z - 1, (Z) ← Rr None 2
STD Z+q,Rr Store Indirect with Displacement (Z + q) ← Rr None 2
STS k, Rr Store Direct to SRAM (k) ← Rr None 2
LPM Load Program Memory R0 ← (Z) None 3
LPM Rd, Z Load Program Memory Rd ← (Z) None 3
LPM Rd, Z+ Load Program Memory and Post-Inc Rd ← (Z), Z ← Z+1 None 3
SPM Store Program Memory (Z) ← R1:R0 None -
IN Rd, P In Port Rd ← P None 1
OUT P, Rr Out Port P ← Rr None 1
PUSH Rr Push Register on Stack STACK ← Rr None 2
POP Rd Pop Register from Stack Rd ← STACK None 2
BIT AND BIT-TEST INSTRUCTIONS
SBI P,b Set Bit in I/O Register I/O(P,b) ← 1 None 2
CBI P,b Clear Bit in I/O Register I/O(P,b) ← 0 None 2
LSL Rd Logical Shift Left Rd(n+1) ← Rd(n), Rd(0) ← 0 Z,C,N,V 1
LSR Rd Logical Shift Right Rd(n) ← Rd(n+1), Rd(7) ← 0 Z,C,N,V 1
ROL Rd Rotate Left Through Carry Rd(0)←C,Rd(n+1)← Rd(n),C←Rd(7) Z,C,N,V 1
ROR Rd Rotate Right Through Carry Rd(7)←C,Rd(n)← Rd(n+1),C←Rd(0) Z,C,N,V 1
ASR Rd Arithmetic Shift Right Rd(n) ← Rd(n+1), n=0..6 Z,C,N,V 1
SWAP Rd Swap Nibbles Rd(3..0)←Rd(7..4),Rd(7..4)←Rd(3..0) None 1
BSET s Flag Set SREG(s) ← 1 SREG(s) 1
BCLR s Flag Clear SREG(s) ← 0 SREG(s) 1
BST Rr, b Bit Store from Register to T T ← Rr(b) T 1
BLD Rd, b Bit load from T to Register Rd(b) ← T None 1
SEC Set Carry C ← 1 C 1
CLC Clear Carry C ← 0 C 1
SEN Set Negative Flag N ← 1 N 1
CLN Clear Negative Flag N ← 0 N 1
SEZ Set Zero Flag Z ← 1 Z 1
CLZ Clear Zero Flag Z ← 0 Z 1
SEI Global Interrupt Enable I ← 1 I 1
CLI Global Interrupt Disable I ← 0 I 1
SES Set Signed Test Flag S ← 1 S 1
CLS Clear Signed Test Flag S ← 0 S 1
SEV Set Twos Complement Overflow. V ← 1 V 1
CLV Clear Twos Complement Overflow V ← 0 V 1
SET Set T in SREG T ← 1 T 1
CLT Clear T in SREG T ← 0 T 1
SEH Set Half Carry Flag in SREG H ← 1 H 1
Instruction Set Summary (Continued)
13
ATmega64(L)
2490F–AVR–12/03
CLH Clear Half Carry Flag in SREG H ← 0 H 1
MCU CONTROL INSTRUCTIONS
NOP No Operation None 1
SLEEP Sleep (see specific descr. for Sleep function) None 1
WDR Watchdog Reset (see specific descr. for WDR/timer) None 1
BREAK Break For On-chip Debug Only None N/A
Instruction Set Summary (Continued)
14 ATmega64(L)
2490F–AVR–12/03
Ordering Information
Note: 1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information
and minimum quantities.
Speed (MHz) Power Supply Ordering Code Package Operation Range
8 2.7 - 5.5 ATmega64L-8AC
ATmega64L-8MC
64A
64M1
Commercial
(0°C to 70°C)
ATmega64L-8AI
ATmega64L-8MI
64A
64M1
Industrial
(-40°C to 85°C)
16 4.5 - 5.5 ATmega64-16AC
ATmega64-16MC
64A
64M1
Commercial
(0°C to 70°C)
ATmega64-16AI
ATmega64-16MI
64A
64M1
Industrial
(-40°C to 85°C)
Package Type
64A 64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M1 64-pad, 9 x 9 x 1.0 mm body, lead pitch 0.50 mm, Micro Lead Frame Package (MLF)
15
ATmega64(L)
2490F–AVR–12/03
Packaging Information
64A
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
64A, 64-lead, 14 x 14 mm Body Size, 1.0 mm Body Thickness,
0.8 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)
64A B
10/5/2001
PIN 1 IDENTIFIER
0°~7°
PIN 1
L
C
A1 A2 A
D1
D
e E1 E
B
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This package conforms to JEDEC reference MS-026, Variation AEB.
2. Dimensions D1 and E1 do not include mold protrusion. Allowable
protrusion is 0.25 mm per side. Dimensions D1 and E1 are maximum
plastic body size dimensions including mold mismatch.
3. Lead coplanarity is 0.10 mm maximum.
A – – 1.20
A1 0.05 – 0.15
A2 0.95 1.00 1.05
D 15.75 16.00 16.25
D1 13.90 14.00 14.10 Note 2
E 15.75 16.00 16.25
E1 13.90 14.00 14.10 Note 2
B 0.30 – 0.45
C 0.09 – 0.20
L 0.45 – 0.75
e 0.80 TYP
16 ATmega64(L)
2490F–AVR–12/03
64M1
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
64M1, 64-pad, 9 x 9 x 1.0 mm Body, Lead Pitch 0.50 mm
Micro Lead Frame Package (MLF) 64M1 C
01/15/03
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A 0.80 0.90 1.00
A1 – 0.02 0.05
b 0.23 0.25 0.28
D 9.00 BSC
D2 5.20 5.40 5.60
E 9.00 BSC
E2 5.20 5.40 5.60
e 0.50 BSC
L 0.35 0.40 0.45
Notes: 1. JEDEC Standard MO-220, Fig. 1, VMMD.
TOP VIEW
SIDE VIEW
BOTTOM VIEW
D
E
Marked Pin# 1 ID
E2
D2
b e
Pin #1 Corner
L
SEATING PLANE
A1
C
A
1
2
3
0.08 C
17
ATmega64(L)
2490F–AVR–12/03
Erratas The revision letter in this section refers to the revision of the ATmega64 device.
ATmega64, all Rev. There are no errata for this revision of ATmega64. However, a proposal for solving problems
regarding the JTAG instruction IDCODE is presented below.
IDCODE masks data from TDI input
The public but optional JTAG instruction IDCODE is not implemented correctly
according to IEEE1149.1; a logic one is scanned into the shift register instead of the
TDI input while shifting the Device ID Register. Hence, captured data from the preceding
devices in the boundary scan chain are lost and replaced by all-ones, and
data to succeeding devices are replaced by all-ones during Update-DR.
If ATmega64 is the only device in the scan chain, the problem is not visible.
Problem Fix / Workaround
Select the Device ID Register of the ATmega64 (Either by issuing the IDCODE
instruction or by entering the Test-Logic-Reset state of the TAP controller) to read
out the contents of its Device ID Register and possibly data from succeeding
devices of the scan chain. Note that data to succeeding devices cannot be entered
during this scan, but data to preceding devices can. Issue the BYPASS instruction
to the ATmega64 to select its Bypass Register while reading the Device ID Registers
of preceding devices of the boundary scan chain. Never read data from
succeeding devices in the boundary scan chain or upload data to the succeeding
devices while the Device ID Register is selected for the ATmega64. Note that the
IDCODE instruction is the default instruction selected by the Test-Logic-Reset state
of the TAP-controller.
Alternative Problem Fix / Workaround
If the Device IDs of all devices in the boundary scan chain must be captured simultaneously
(for instance if blind interrogation is used), the boundary scan chain can
be connected in such way that the ATmega64 is the fist device in the chain. Update-
DR will still not work for the succeeding devices in the boundary scan chain as long
as IDCODE is present in the JTAG Instruction Register, but the Device ID registered
cannot be uploaded in any case.
18 ATmega64(L)
2490F–AVR–12/03
Datasheet Change
Log for ATmega64
Please note that the referring page numbers in this section are referred to this document.
The referring revision in this section are referring to the document revision.
Changes from Rev.
2490E-09/03 to Rev.
2490F-12/03
1. Updated “Calibrated Internal RC Oscillator” on page 40.
Changes from Rev.
2490D-02/03 to Rev.
2490E-09/03
1. Updated note in “XTAL Divide Control Register – XDIV” on page 43.
2. Updated “JTAG Interface and On-chip Debug System” on page 48.
3. Updated “Test Access Port – TAP” on page 248 regarding JTAGEN.
4. Updated description for the JTD bit on page 258.
5. Added a note regarding JTAGEN fuse to Table 119 on page 292.
6. Updated RPU values in “DC Characteristics” on page 326.
7. Updated “ADC Characteristics – Preliminary Data” on page 333.
8. Added a proposal for solving problems regarding the JTAG instruction
IDCODE in “Erratas” on page 17.
Changes from Rev.
2490C-09/02 to Rev.
2490D-02/03
1. Added reference to Table 125 on page 296 from both SPI Serial Programming
and Self Programming to inform about the Flash page size.
2. Added Chip Erase as a first step under “Programming the Flash” on page 323
and “Programming the EEPROM” on page 324.
3. Corrected OCn waveforms in Figure 52 on page 124.
4. Various minor Timer1 corrections.
5. Improved the description in “Phase Correct PWM Mode” on page 99 and on
page 152.
6. Various minor TWI corrections.
7. Added note under "Filling the Temporary Buffer (Page Loading)" about writing
to the EEPROM during an SPM page load.
8. Removed ADHSM completely.
9. Added note about masking out unused bits when reading the Program
Counter in “Stack Pointer” on page 12.
10. Added section “EEPROM Write During Power-down Sleep Mode” on page 23.
11. Changed VHYST value to 120 in Table 19 on page 50.
19
ATmega64(L)
2490F–AVR–12/03
12. Added information about conversion time for Differential mode with Auto
Triggering on page 234.
13. Added tWD_FUSE in Table 129 on page 309.
14. Updated “Packaging Information” on page 15.
Changes from Rev.
2490B-09/02 to Rev.
2490C-09/02
1. Changed the Endurance on the Flash to 10,000 Write/Erase Cycles.
Changes from Rev.
2490A-10/01 to Rev.
2490B-09/02
1. Added 64-pad MLF Package and updated “Ordering Information” on page 14.
2. Added the section “Using all Locations of External Memory Smaller than 64
KB” on page 33.
3. Added the section “Default Clock Source” on page 36.
4. Renamed SPMCR to SPMCSR in entire document.
5. Added Some Preliminary Test Limits and Characterization Data
Removed some of the TBD's and corrected data in the following tables and pages:
Table 2 on page 22, Table 7 on page 36, Table 9 on page 38, Table 10 on page 38,
Table 12 on page 39, Table 14 on page 40, Table 16 on page 41, Table 19 on page
50, Table 20 on page 54, Table 22 on page 56, “DC Characteristics” on page 326,
Table 132 on page 328, Table 135 on page 331, Table 137 on page 334, and Table
138 - Table 145.
6. Removed Alternative Algortihm for Leaving JTAG Programming Mode.
See “Leaving Programming Mode” on page 322.
7. Improved description on how to do a polarity check of the ADC diff results in
“ADC Conversion Result” on page 242.
8. Updated Programming Figures:
Figure 138 on page 294 and Figure 147 on page 307 are updated to also reflect that
AVCC must be connected during Programming mode. Figure 142 on page 303
added to illustrate how to program the fuses.
9. Added a note regarding usage of the “PROG_PAGELOAD (0x6)” and
“PROG_PAGEREAD (0x7)” instructions on page 314.
10. Updated “Two-wire Serial Interface” on page 196.
More details regarding use of the TWI Power-down operation and using the TWI as
master with low TWBRR values are added into the data sheet. Added the note at
the end of the “Bit Rate Generator Unit” on page 202. Added the description at the
end of “Address Match Unit” on page 203.
11. Updated Description of OSCCAL Calibration Byte.
In the data sheet, it was not explained how to take advantage of the calibration
bytes for 2, 4, and 8 MHz Oscillator selections. This is now added in the following
sections:
20 ATmega64(L)
2490F–AVR–12/03
Improved description of “Oscillator Calibration Register – OSCCAL(1)” on page 40
and “Calibration Byte” on page 293.
12. When using external clock there are some limitations regards to change of
frequency. This is descried in “External Clock” on page 41 and Table 132 on
page 328.
13. Added a sub section regarding OCD-system and power consumption in the
section “Minimizing Power Consumption” on page 47.
14. Corrected typo (WGM-bit setting) for:
– “Fast PWM Mode” on page 97 (Timer/Counter0).
– “Phase Correct PWM Mode” on page 99 (Timer/Counter0).
– “Fast PWM Mode” on page 150 (Timer/Counter2).
– “Phase Correct PWM Mode” on page 152 (Timer/Counter2).
15. Corrected Table 81 on page 190 (USART).
16. Corrected Table 103 on page 262 (Boundary-Scan)