RST7275-1 Datasheet, PDF (2/3 Pages) STMicroelectronics – 8-BIT, 56-PIN MCU FOR MONITORS, WITH UP TO 60K ROM, 2K RAM, ADC, TIMER, IR, SYNC, PWM/BRM, DDC/DMA, I2C & SCI

ST7275-1
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST7275 is a HCMOS microcontroller unit
(MCU) from the ST7 family with dedicated periph-
erals for Monitor applications.
It is based around an industry standard 8-bit core
and offers an enhanced instruction set. The proc-
essor runs with an external clock at 24 MHz with
a 5V supply. Due to the fully static design of this
device, operation down to DC is possible. Under
software control the ST7275 can be placed in
WAIT or HALT mode thus reducing power con-
sumption. The enhanced instruction set and ad-
dressing modes afford real programming potential.
Figure 1. ST7275-1 Block Diagram
In addition to standard 8-bit data management the
ST7 features true bit manipulation, 8x8 unsigned
multiplication and indirect addressing modes.
The device includes an on-chip oscillator, CPU,
Sync Processor for video timing & Vfback analy-
sis, up to 60K ROM, up to 2K RAM, I/O, a timer
with 2 input captures and 2 output compares, an 8-
channel Analog to Digital Converter, DDC/DMA,
I²C multi Master, SCI Serial Communications In-
terface, Watchdog Reset, an Infra Red Control
preprocessor, and one 12-bit and eight 10-bit
PWM/BRM outputs for analog DC control of exter-
nal functions.
Up to 60K Bytes
ROM/
OTP/EPROM
PORT A
INFRA RED
PA0..6
PA7/BLANKOUT
V_{D D A}
V_{S S A}
IR IN
Up to 2K Bytes
RAM
SCI
(UART)
DDC DMA
CONTROL
8-BIT CORE
ALU
POWER ON/OFF
IN T E R N A L
POWER
SUPPLY
CLOCK
OSC /3 or 6
V_DD V_SS OSCIN OSCOUT
ADC
PORT B
AIN 0-AIN7
I²C
DDC
TDO
SCLD
SDAD
PORT C
T IM ER
OCMP
WATCHDOG
P B 1..7/A IN 1..7
P B 0 /V FB A C K /A IN 0
P C7 /T DO
P C 6 /R D I
P C 5 /S D A I
P C 4 /S C LI
P C 3 /S D A D
PC2/RX/SCLD
P C 1 /H S Y N C I2
P C0 /O C M P /H F B A C K
RESET
SYNC
PROCESSOR
PORT D
PWM/BRM
VSYNCI1
H S Y N C I1
PD7/VSYNCI2/ITD
PD6/CLAMPOUT
PD5/ITA
PD4/ITB
PD3/ITC
PD2/VSYNCO
PD1/HSYNCO
PD0/CSYNCI
DA0
D A 1 ,D A 8
VR01735Q
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