ST6255B View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST6255B
STMicroelectronics
'ST6255B' PDF : 74 Pages View PDF
ST62T55B ST62T65B/E65B
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST62T55B, ST62T65B and ST62E65B devic-
es are low cost members of the ST62xx 8-bit HC-
MOS family of microcontrollers, which is targeted
at low to medium complexity applications. All
ST62xx devices are based on a building block ap-
proach: a common core is surrounded by a
number of on-chip peripherals.
The ST62E65B is the erasable EPROM version of
the ST62T65B device, which may be used to em-
ulate the ST62T55B and ST62T65B device, as
well as the respective ST6255B and ST6265B
ROM devices.
OTP and EPROM devices are functionally identi-
cal. The ROM based versions offer the same func-
tionality selecting as ROM options the options de-
Fj igure 1. Block Diagram
fined in the programmable option byte of theOTP/
EPROM versions.
OTP devices offer all the advantages of user pro-
grammability at low cost, which make them the
ideal choice in a wide range of applications where
frequent code changes, multiple code versions or
last minute programmability are required.
These compact low-cost devices feature a Timer
comprising an 8-bit counter and a 7-bit program-
mable prescaler, an 8-bit Auto-Reload Timer,
EEPROM data capability (except ST62T55B), a
serial port communication interface, an 8-bit A/D
Converter with 13 analog inputs and a Digital
Watchdog timer, making them well suited for a
wide range of automotive, appliance and industrial
applications.
TEST/VPP
NMI
TEST
8-BIT
A/D CONVERTE R
INTERRUP T
PROGR AM
MEMORY
3884 bytes OTP
(ST62T55B, T6 5B)
3884 bytes EPROM
(ST62E65B)
DATA ROM
USER
SELECTABLE
DATA RAM
128 Bytes
DATA EEPROM
128 Bytes
( ST62T65B/E65B)
PC
STACK LEVEL 1
STACK LEVEL 2
STACK LEVEL 3
STACK LEVEL 4
STACK LEVEL 5
STACK LEVEL 6
8 BIT CORE
POWER
SUPP LY
OSCILLATOR
RESET
PORT A
PORT B
PORT C
AUTORELOAD
TIMER
TIMER
SPI (SERIAL
PE RIPHERAL
INTERFAC E)
DIGITAL
WATCHDOG
PA0..PA7 / Ain
PB0..PB5 / 20 mA Sink
PB6 / ARTimin / 20 mA Sink
PB7 / ARTimout / 20 mA Sink
PC0 / Ain
PC1 / Tim1 / Ain
PC2 / Sin / Ain
PC3 / Sout / Ain
PC4 / Sck / Ain
VDD VSS OSCin OSCout RESET
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