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STMicroelectronics Electronic Components Datasheet

ST7275-1 Datasheet

8-BIT MCU FOR MONITORS

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R ST7275-1
8-BIT, 56-PIN MCU FOR MONITORS, WITH UP TO 60K ROM, 2K
RAM, ADC, TIMER, IR, SYNC, PWM/BRM, DDC/DMA, I2C & SCI
PRODUCT PREVIEW
s User ROM/OTP/EPROM: up to 60 Kbytes
s Data RAM: up to 2 Kbytes (256 bytes stack)
s 8 MHz Maximum Internal Clock Frequency in
fast mode, 4 MHz in normal mode
s Run, Wait and Halt CPU modes
s Sync Processor for Mode Recognition, power
management and composite video blanking,
clamping and free-running frequency
generation.
– Corrector mode
– Analyzer mode
s Fast I2C Multi Master Interface
s DDC Bus Interface fully compliant with DDC1,
2B, 2B+, 2AB, 2Bi standards
s 32 I/O lines
– 8 Open Drain I/Os with high current capacity
(10 mA) on port A
– 5 lines programmable as interrupt inputs
s 16-bit timer with 2 input captures and 2 output
compare functions (with 1 output pin)
s 8-bit Analog to Digital Converter with 8
channels on port B
s 8 10-bit PWM/BRM Digital to Analog outputs
s One 12-bit PWM/BRM Digital to Analog output
s Asynchronous
Interface
Serial
Communications
s Infra red controller
s Master Reset and Power on/off reset1
s Programmable Watchdog for system reliability
s 56-pin Shrink Dual In line Plastic package
s Fully static operation
s 0 to + 70 oC operating temperature range
s 4.0V to 5.5V supply operating range
s 24 MHz Quartz Oscillator
s 63 basic instructions/17 main address modes
s 8x8 unsigned multiply instruction
s True bit manipulation
s Versatile Development Tools (DOS and
Windows) including assembler, linker, C-
compiler, archiver, source level debugger,
EPROM programmer and hardware emulator
PSDIP56
See Ordering Information at the end of the Document
Device Summary
Features
ROM
(bytes)
RAM
(bytes)
ADC
Timer
I2C Bus
DDC/DMA
Sync
PWM
I/O
SCI
IR
EPROM
Device
OTP
Device
ST72751N9 ST72751N7 ST72751N6
60K 48K 32K
2K 1.5
8 channels
1
one multimaster
yes
yes
9
32
yes
yes
ST72E751N9D1
1
ST72T751N9B1
Note 1: Power On/Off reset not implemented in
this revision.
April 1998
This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change without notice.
1/3
1


STMicroelectronics Electronic Components Datasheet

ST7275-1 Datasheet

8-BIT MCU FOR MONITORS

No Preview Available !

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
VD D A
VS 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
VDD VSS OSCIN OSCOUT
ADC
PORT B
AIN 0-AIN7
I²C
DDC
SCLD
SDAD
PORT C
T IM ER
OCMP
WATCHDOG
TDO
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
2/3


Part Number ST7275-1
Description 8-BIT MCU FOR MONITORS
Maker ST Microelectronics
Total Page 3 Pages
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