st7277 STMicroelectronics, st7277 Datasheet - Page 2

• Manufacturer Part Number: st7277
• Description: 8-bit Usb Mcu For Monitors With Up To 60k Rom, 2k Ram, Adc, Timer, Infra Red, Sync, Pwm/brm, Ddc/dma, I2c & Sci
• Manufacturer: STMicroelectronics

ST7277
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST7277 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 ST7277 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. ST7277 Block Diagram
2/3
V
SUPPLY
POWER
DD
V
8-BIT CO RE
POWER ON/OFF
SS
Up to
CONTROL
Up to
DDC DMA
USB DMA
OSCIN
OSC /3 or 6
(UART)
ALU
ROM
60K Bytes
RAM
2K Bytes
SCI
OSCOUT
INTERNAL
CLOCK
PROCESSOR
W ATCHDOG
INFRA RED
PW M/BRM
PORT B
PORT C
PORT C
PORT D
TIMER
PO RT A
SYNC
ADC
DDC
USB
SIE
I C
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, USB/DMA, I/
O, a timer with 2 input captures and 2 output com-
pares, an 8-channel Analog to Digital Converter,
DDC/DMA, I
cations Interface, Watchdog Reset, an Infra Red
Control preprocessor, and one 12-bit and eight 10-
bit PWM/BRM outputs for analog DC control of ex-
ternal functions.
SDAD
SCLD
OCMP
AIN 0-AIN7
TDO
2
C multi Master, SCI Serial Communi-
PA0-PA6 PA7/BLANKOUT
V
V
PB1..7/AIN1..7
PB 0/
IR IN
USBV
USBDP
USBDM
USBGND
PC7/TDO
PC6/RD I
PC5/SDAI
PC4/SCLI
PC3/SDAD
PC2/RX/SCLD
PC1/HSYN CI2
PC0/OCMP/HFBACK
VSYN CI1
HSYNCI1
PD7/VSYNCI2
PD6/CLAMPOUT
PD5/ITA
PD4/ITB
PD3/ITC
PD2/VSYNCO
PD1/HSYNCO
PD0/CSYNCI
DA0
DA1,DA8
RESET
D D A
S S A
VFBAC K/AIN0
C C
VR01735Q