ST72C254G2 datasheet(6/135 Pages) STMICROELECTRONICS

6 / 135 page

ST72104G, ST72215G, ST72216G, ST72254G

6/135

1 INTRODUCTION

The ST72104G, ST72215G, ST72216G and

ST72254G devices are members of the ST7 mi-

crocontroller family. They can be grouped as fol-

lows:

– ST72254G devices are designed for mid-range

applications with ADC and I C interface capabili-

ties.

– ST72215/6G devices target the same range of

applications but without I C interface.

– ST72104G devices are for applications that do

not need ADC and I C peripherals.

All devices are based on a common industry-

standard 8-bit core, featuring an enhanced instruc-

tion set.

The ST72C104G, ST72C215G, ST72C216G and

ST72C254G

versions

feature

single-voltage

FLASH memory with byte-by-byte In-Situ Pro-

gramming (ISP) capability.

Under software control, all devices can be placed

in WAIT, SLOW, or HALT mode, reducing power

consumption when the application is in idle or

standby state.

The enhanced instruction set and addressing

modes of the ST7 offer both power and flexibility to

software developers, enabling the design of highly

efficient and compact application code. In addition

to standard 8-bit data management, all ST7 micro-

controllers feature true bit manipulation, 8x8 un-

signed multiplication and indirect addressing

modes.

For easy reference, all parametric data are located

in Section 13 on page 96.

Figure 1. General Block Diagram

8-BIT CORE

ALU

OSC1

OSC2

RESE T

PORT B

16-BIT TIMER A

PORT A

SPI

PORT C

8-BIT ADC

WATCHDOG

PB7:0

(8 bits)

PC5:0

(6 bits)

MULTI OSC

Internal

CLOCK

CONTROL

RAM

(256 Bytes)

PA7:0

(8 bits)

VSS

VDD

POWER

SUPPLY

16-BIT TIMER B

PROGRAM

(4 or 8K Bytes)

LVD

CLOCK FILTER

MEMORY

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