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ST7285C Datasheet(HTML) 98 Page - STMicroelectronics

Part No. ST7285C
Description  8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST7285C Datasheet(HTML) 98 Page - STMicroelectronics

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ST72E85 ST72T85
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST72E85 is the EPROM version of the
ST7285C. Please refer to the ST7285C ROM de-
vice Datasheet for further details.
From the User’s point of view, both theST72E85
and the ST7285C possess the same software and
hardware features.
An additional mode is available to allow program-
ming of the EPROM user memory array. This is
set by a specific voltage source applied to the V
PP/
Test pin.
The ST72E85 (EPROM) features a 48K EPROM
memory.
Watchdog activation is available by Software for
Eprom and OTP devices.
Figure 1. ST72E85 Block Diagram
*Note: EPROM and OTP versions only.
Power on Reset
PA0 - PA7
Pin 65..72
PB0 - PB7
Pin 73..80
OSCin
OSCout
RESET
V
PP / TEST
OSC
8 -BIT CORE
ALU
VR01735P
Internal
CLOCK
Timer A
PORT A
PORT B
A/D Converter
8
4
SPI B
PORT C
PC0 - PC7
Pin 5..12
SPI A
PORT D
I2C
SCI
8
RAM
3k
RDS
FILTER,DEMOD,GBS
8
8
8
Timer B
4
4
2
PD0 - PD7
Pin 13..20
2
PORT E
PE0 - PE7
Pin 25..32
8
PORT F
PF0 - PF7
Pin 33..40
8
PORT H
PORT G
PH0 - PH5
Pin 53..58
6
PG0 - PG7
Pin 45..52
8
ROM or EPROM*
48k
Watchdog
RDScomp
MPX
RDS fil
RDS ref
ARS
AINT
V
DD
V
SS
V
DDP
V
SSP
V
DDA
V
SSA
2
2


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