AT90S4434-8AI Atmel, AT90S4434-8AI Datasheet - Page 2

• Manufacturer Part Number: AT90S4434-8AI
• Description: IC MCU 4K 8MHZ A/D IT 44TQFP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S4434-8AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Description
The AT90S4434/8535 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing pow-
erful instructions in a single clock cycle, the AT90S4434/8535 achieves throughputs approaching 1 MIPS per MHz allowing
the system designer to optimize power consumption versus processing speed.
Block Diagram
Figure 1. The AT90S4434/8535 Block Diagram
2
AT90S/LS4434 and AT90S/LS8535
AGND
AVCC
AREF
VCC
GND
PROGRAMMING
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
DECODER
FLASH
LOGIC
LINES
DATA REGISTER
DATA REGISTER
ANALOG MUX
PORTA
PORTB
PORTA DRIVERS
PORTB DRIVERS
PA0 - PA7
PB0 - PB7
REGISTERS
REGISTER
GENERAL
PURPOSE
POINTER
STATUS
STACK
SRAM
ALU
SPI
X
Y
Z
REG. PORTB
REG. PORTA
DATA DIR.
DATA DIR.
ADC
8-BIT DATA BUS
DATA REGISTER
DATA REGISTER
MCU CONTROL
OSCILLATOR
WATCHDOG
INTERRUPT
COUNTERS
INTERNAL
REGISTER
EEPROM
PORTC
TIMER/
PORTD
TIMER
UART
UNIT
PORTC DRIVERS
PORTD DRIVERS
PC0 - PC7
PD0 - PD7
REG. PORTC
REG. PORTD
DATA DIR.
DATA DIR.
OSCILLATOR
OSCILLATOR
TIMING AND
CONTROL
XTAL1
XTAL2
RESET