ST7LITE20 datasheet(5/131 Pages) STMICROELECTRONICS

5 / 131 page

ST7LITE2

5/131

1 INTRODUCTION

The ST7LITE2 is a member of the ST7 microcon-

troller family. All ST7 devices are based on a com-

mon industry-standard 8-bit core, featuring an en-

hanced instruction set.

The

ST7LITE2 features FLASH memory with

byte-by-byte In-Circuit Programming (ICP) and In-

Application Programming (IAP) capability.

Under software control, the ST7LITE2 device can

be placed in WAIT, SLOW, or HALT mode, reduc-

ing 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 91.

The devices feature an on-chip Debug Module

(DM) to support in-circuit debugging (ICD). For a

description of the DM registers, refer to the ST7

ICC Protocol Reference Manual.

Figure 1. General Block Diagram

8-BIT CORE

ALU

OSC1

OSC2

RESET

PORT A

Internal

CLOCK

CONTROL

RAM

(384 Bytes)

PA7:0

(8 bits)

VSS

VDD

POWER

SUPPLY

PROGRAM

(8K Bytes)

LVD

MEMORY

PLL x 8

Ext.

1MHz

PLL

Int.

1MHz

8-Bit

LITE TIMER 2

PORT B

SPI

PB6:0

(7 bits)

DATA EEPROM

(256 Bytes)

1% RC

OSC

16MHz

ADC

+ OpAmp

12-Bit

Auto-Reload

TIMER 2

CLKIN

/ 2

or PLL X4

8MHz -> 32MHz

WATCHDOG

Debug Module

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