April 1998
1/3
This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change without notice.
R
ST72752
8-BIT MCU FOR MONITORS WITH UP TO 32K ROM, 1K RAM, ADC,
TIMER, SYNC, PWM/BRM, DDC/DMA & I
2
C
BRIEF DATA
s
User ROM/OTP/EPROM: up to 32 Kbytes
s
Data RAM: up to 1 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 I
2
C Multi Master Interface
s
DDC Bus Interface fully compliant with DDC1,
2B, 2B+, 2AB, 2Bi standards
s
23 I/O lines
1 high current I/O (10 mA)
Up to 5 high voltage outputs (9V)
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 4
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
Master Reset and Power on/off reset
1
s
Programmable Watchdog for system reliability
s
42-pin Shrink Dual In line Plastic package
s
Fully static operation
s
0 to + 70
o
C 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,
programmer, and hardware emulator
Note 1: Power On/Off reset not implemented in
this revision.
Device Summary
Features
ST72752J6
ST72752J5
ST72752J4
ROM
(bytes)
32K 24K 16K
RAM
(bytes)
1K
768
512
ADC
4 channels
Timer
1
I
2
C Bus
one multimaster
DDC/DMA
yes
Sync yes
PWM
9
I/O
23
EPROM
Device
ST72E752J6D1
OTP
Device
ST72T752J6B1
See Ordering Information at the end of the Document
PSDIP42
1
2/3
ST72752
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST72752 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 ST72752 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.
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 32K ROM, up to 1K RAM, I/O, a timer
with 2 input captures and 2 output compares, a 4-
channel Analog to Digital Converter, DDC/DMA,
I
2
C multi Master, Watchdog Reset, and one 12-bit
and eight 10-bit PWM/BRM outputs for analog DC
control of external functions.
Figure 1. .ST72752 Block Diagram
SYNC
PROCESSOR
POWER
SU PPLY
OSC /3 or 6
V
DD
POR T A
PORT C
P
C
L
A
D
D
R
E
S
S
/
D
A
T
A
B
U
S
E
S
DDC
TIM ER
WATCHDOG
PORT D
C
S
Y
N
C
I
H
S
Y
N
C
O
V
S
Y
N
C
O
H
/
C
S
Y
N
C
V
S
Y
N
C
OCMP
C
L
A
M
P
O
U
T
PWM/BRM
PORT B
ADC
A IN 0..2, AIN7
DA0
32K Bytes
RAM
1K Bytes
CONTROL
8-BIT CORE
ALU
P
C
H
S
P
X
Y
A
C
C
INTERNAL
CLOC K
V
SS
OSCOUT
OSCIN
DA1,DA8
DDC DM A
H
F
B
A
C
K
PORT C
SCLD
SDAD
IC
S
C
L
I
S
D
A
I
VR01735R
PA3..6(HV)
PA7/BLANKOUT
V
D D A
V
S S A
PC3/SDAD
PC2/RX/SCLD
PC0/OCMP/HFBACK
RESET
HSYNCI
VSYNCI
PB1..2/ AIN1..2
VFBACK/AIN0
PC4/SCLI
PC5/SDAI
PC6 (HC)
POWER ON/OFF
ROM/
Up to
Up to
PB0/
PD0/CSYNCI
PD1/HSYNCO
PD2/VSYNCO
PD3/ITC
PD4/ITB
PD5/ITA
PD6/CLAMPOUT
PB7/AIN7
EPROM/OTP
V
F
BAC
K
PA1(HV)
3/3
ST72752
Notes:
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no
responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights
of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice.
This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products
are not authorized for use as critical components in life support devices or systems without the express written approval
of SGS-THOMSON Microelectronics.
1998 SGS-THOMSON Microelectronics - All Rights Reserved.
Purchase of I
2
C Components by SGS-THOMSON Microelectronics conveys a license under the Philips I
2
C Patent. Rights to use these
components in an I
2
C system is granted provided that the system conforms to the I
2
C Standard Specification as defined by Philips.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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