ATMEGA164A_11 ATMEL [ATMEL Corporation], ATMEGA164A_11 Datasheet - Page 5

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ATMEGA164A_11

Manufacturer Part Number
ATMEGA164A_11
Description
8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
2. Overview
2.1
Figure 2-1.
8272CS–AVR–06/11
RESET
XTAL1
XTAL2
Block Diagram
VCC
GND
Block Diagram
POR / BOD &
Supervision
Generation
Watchdog
Watchdog
Oscillator
Oscillator
Circuits /
RESET
Power
Timer
Clock
TOSC2/PC7
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P is a low-power CMOS 8-bit
microcontroller based on the AVR enhanced RISC architecture. By executing powerful instruc-
tions in a single clock cycle, the ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P
achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
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.
TOSC1/PC6
ATmega164A/PA/324A/PA/644A/PA/1284/P
JTAG/OCD
PORT C (8)
EEPROM
Converter
TWI
PC5..0
A/D
PORT A (8)
PA7..0
FLASH
Bandgap reference
Internal
CPU
SRAM
Comparator
Analog
PORT B (8)
8bit T/C 0
PORT D (8)
16bit T/C 1
8bit T/C 2
16bit T/C 3
PB7..0
PD7..0
SPI
16bit T/C 1
USART 0
USART 1
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