1

Pin Configurations

TQFP Top View

PDIP

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

(INT1) PD3

(T0) PD4

NC

VCC

GND

NC

XTAL1

XTAL2

PC1 (ADC1)

PC0 (ADC0)

NC

AGND

AREF

NC

AVCC

PB5 (SCK)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

RESET

(RXD) PD0

(TXD) PD1

(INT0) PD2

(INT1) PD3

(T0) PD4

VCC

GND

XTAL1

XTAL2

(T1) PD5

(AIN0) PD6

(AIN1) PD7

(ICP) PB0

PC5 (ADC5)

PC4 (ADC4)

PC3 (ADC3)

PC2 (ADC2)

PC1 (ADC1)

PC0 (ADC0)

AGND

AREF

AVCC

PB5 (SCK)

PB4 (MISO)

PB3 (MOSI)

PB2 (SS)

PB1 (OC1)

Features

– 118 Powerful Instructions - Most Single Cycle Execution

– 32 x 8 General Purpose Working Registers

– Up to 8 MIPS Throughput at 8 MHz

– 2K/4K Bytes of In-System Programmable Flash

Endurance 1,000 Write/Erase Cycles

– 128 Bytes of SRAM

– 128/256 Bytes of In-System Programmable EEPROM

Endurance: 100,000 Write/Erase Cycles

– Programming Lock for Flash Program and EEPROM Data Security

– One 8-bit Timer/Counter with Separate Prescaler

– Expanded 16-bit Timer/Counter with Separate Prescaler,

Compare, Capture Modes and 8-, 9- or 10-bit PWM

– On-chip Analog Comparator

– Programmable Watchdog Timer with Separate On-chip Oscillator

– Programmable UART

– 6-channel, 10-bit ADC

– Master/Slave SPI Serial Interface

– Brown-Out Reset Circuit

– Enhanced Power-on Reset Circuit

– Low-Power Idle and Power Down Modes

– External and Internal Interrupt Sources

– Low-power, High-speed CMOS Process Technology

– Fully Static Operation

°C

– Active: 3.4 mA

– Idle Mode: 1.4 mA

– Power Down Mode: <1 µA

– 20 Programmable I/O Lines

– 28-pin PDIP and 32-pin TQFP

– 2.7V - 6.0V (AT90LS2333 and AT90LS4433)

– 4.0V - 6.0V (AT90S2333 and AT90S4433)

– 0 - 4 MHz (AT90LS2333 and AT90LS4433)

– 0 - 8 MHz (AT90S2333 and AT90S4433)

Rev. 1042DS–04/99

8-bit

Microcontroller

with 2K/4K bytes

In-System

Programmable

Flash

AT90S2333

AT90LS2333

AT90S4433

AT90LS4433

Preliminary

Note: This is a summary document. For the complete 103 page

document, please visit our Web site at www.atmel.com or e-mail

at literature@atmel.com and request literature #1042D.