ST72121J4 查看數據表（PDF） - STMicroelectronics

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ST72121J4

8-BIT MCU WITH 8 TO 16K OTP/EPROM, 384 TO 512 BYTES RAM, WDG, SCI, SPI AND 2 TIMERS

STMicroelectronics 

ST72E121

ST72T121

8-BIT MCU WITH 8 TO 16K OTP/EPROM,

384 TO 512 BYTES RAM, WDG, SCI, SPI AND 2 TIMERS

DATASHEET

s User Program Memory (OTP/EPROM):

8 to 16K bytes

s Data RAM: 384 to 512 bytes including 256 bytes

of stack

s Master Reset and Power-On Reset

s Low Voltage Detector (LVD) Reset option

s Run and Power Saving modes

s 32 multifunctional bidirectional I/O lines:

– 9 programmable interrupt inputs

– 4 high sink outputs

– 13 alternate functions

– EMI filtering

s Software or Hardware Watchdog (WDG)

s Two 16-bit Timers, each featuring:

– 2 Input Captures and 2 Output Compares 1)

– External Clock input (on Timer A)

– PWM and Pulse Generator modes

s Synchronous Serial Peripheral Interface (SPI)

s Asynchronous Serial Communications Interface

(SCI)

s 8-bit Data Manipulation

s 63 basic Instructions and 17 main Addressing

Modes

s 8 x 8 Unsigned Multiply Instruction

s True Bit Manipulation

s Complete Development Support on DOS/

WINDOWSTM Real-Time Emulator

s Full Software Package on DOS/WINDOWSTM

(C-Compiler, Cross-Assembler, Debugger)

Note: 1. One only of each on Timer A.

PSDIP42

CSDIP42W

TQFP44

(See ordering information at the end of datasheet)

Device Summary

Features

ST72T121J2

ST72T121J4

Program Memory - bytes

RAM (stack) - bytes

Peripherals

Operating Supply

CPU Frequency

Temperature Range

Package

OTP/EPROM Devices

8K

16K

384 (256)

512 (256)

Watchdog, Timers, SPI, SCI and optional Low Voltage Detector Reset

3 to 5.5 V

8MHz max (16MHz oscillator) - 4MHz max over 85°C

- 40°C to + 125°C

TQFP44 - SDIP42

ST72T121J4/ST72E121J4

Note: ROM versions are supported by the ST72334/124 family. Important product differences must be taken into account.

Refer to the Preamble in the ST72334/124 Datasheet for more information.

May 2001

Revision 1.9

1/93

1

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