at90pwm2 ATMEL Corporation, at90pwm2 Datasheet - Page 7

• Manufacturer Part Number: at90pwm2
• Description: At90pwm2 8-bit Avr Microcontroller With 8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

4.1
4317IS–AVR–01/08
Block Diagram
Figure 4-1.
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 con-
ventional CISC microcontrollers.
The AT90PWM2/2B/3/3B provides the following features: 8K bytes of In-System Programmable
Flash with Read-While-Write capabilities, 512 bytes EEPROM, 512 bytes SRAM, 53 general
purpose I/O lines, 32 general purpose working registers,three Power Stage Controllers, two flex-
ible Timer/Counters with compare modes and PWM, one USART with DALI mode, an 11-
channel 10-bit ADC with two differential input stage with programmable gain, a 10-bit DAC, a
programmable Watchdog Timer with Internal Oscillator, an SPI serial port, an On-chip Debug
system and four software selectable power saving modes.
Block Diagram
Control Lines
8Kx8 Flash
Instruction
Instruction
Program
Memory
Register
Decoder
Program
Counter
and Control
EEPROM
512 bytes
Registrers
AT90PWM2/3/2B/3B
I/O Lines
Purpose
General
SRAM
512 bytes
Data Bus 8-bit
Status
32 x 8
Data
ALU
DALI USART
Comparators
Watchdog
PSC 2/1/0
Interrupt
Timer
Timer 0
3 Analog
Timer 1
ADC
Unit
Unit
DAC
SPI
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