SGS Thomson Microelectronics ST72T91L, ST7291L6, ST7291L5A, ST7291L5, ST7291L4 Datasheet
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ST7291L |
8-BIT MCU WITH 8/12/16/24/32K ROM, TIMER, SUPPLY SUPERVISOR AND CARRIER FREQUENCY GENERATOR
BRIEF DATA
■2 to 5.5V Supply Operating Range
■8MHz Maximum Clock Frequency
■Fully Static Operation
■0 to +70°C Operating Temperature Range
■Run, Wait, Stop and RAM Retention modes
■User ROM: 12/16/24/ 32 Kbytes
■Data RAM: 256/384 bytes
■28 pin SO Plastic Packages
■21 Bidirectional I/O lines
■8 standard Push-pull I/Os with wake-up feature 13 standard Push-pull I/Os
■16-bit Timer with Output Compare (no output pin)
■Low Voltage Detector (LVD)
■Interrupt Wake-up function
■IR Carrier Frequency Generator
■8-bit Data Manipulation
■63 Basic Instructions
■17 main Addressing Modes
■8x8 Unsigned Multiply instruction
■True Bit Manipulation
■Complete Development Support on PC/DOS/ Windows 3.1x/95/NT with Real-Time Emulator
■Full Software Package (Cross -Assembler, Debugger)
■Full Hardware Emulator
■EPROM and OTP support
DEVICE SUMMARY
DEVICE |
ROM |
RAM |
CARRIER |
|
(Bytes) |
(Bytes) |
GENERATOR |
||
|
||||
ST7291L6(1) |
32K |
384 |
Yes |
|
ST7291L5 |
24K |
384 |
Yes |
|
ST7291L5A |
16K |
384 |
Yes |
|
ST7291L4 |
16K |
256 |
No |
|
ST7291L3 |
12K |
256 |
No |
|
ST7291L2 |
8K |
256 |
No |
PSO28
(See end of Datasheet for Ordering Information)
Note 1. This device is in development, consult your
SGS-TH OMSON representative for the current status.
Figure 1. Pin Description
VDD |
1 |
28 |
OSCin |
RESET |
2 |
27 |
OSCout |
WKP |
3 |
26 |
PC1/OP (1) |
PA7 |
4 |
25 |
PC6 |
PA6 |
5 |
24 |
PC7 |
PA5 |
6 |
23 |
VSS |
PA4 |
7 |
22 |
TEST |
PA3 |
8 |
21 |
PC5 |
PA2 |
9 |
20 |
PB7 |
PA1 |
10 |
19 |
PB6 |
PC0 |
11 |
18 |
PB5 |
PA0 |
12 |
17 |
PB4 |
PB0 |
13 |
16 |
PB3 |
PB1 |
14 |
15 |
PB2 |
Notes:
1.PC1 on ST7291L2/L3/L4; software selectable as OP on ST7291L6/L5/L5A
December 1997 |
1/5 |
This is preliminary information ona new product in development orundergoing evaluation. Details are subject to change without notice.
ST7291L
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST7291L CMOS Microcontroller Unit is a member of the ST7 family of microcontrollers. The device is based on an industry-standard 8-bit core and features an enhanced instruction set. Oscillator frequency may be as high as 8MHz, however, thanks to the fully static design, operation is possible down to DC. Under software control, the ST7291L may be placed in either WAIT or HALT modes, thus reducing power consumption.
Figure 2. ST7291L Block Diagram
The enhanced instruction set and addressing modes afford real programming potential. In addition to standard 8-bit data management, the ST7291L features bit manipulation, 8x8 unsigned multiplication and indirect addressing modes.
The device includes a CPU, ROM, RAM, I/O, an on-chip oscillator, a timer with output compare system and, depending on the version, a Low Voltage Detection (LVD) and Carrier Frequency generation for remote control applications.
OSCin
OSCout
WKP
RESET
ADDRESS BUS
Internal
OSCILLATOR CLOCK
CONTROL |
|
|
8 BIT CORE |
|
DATA BUS |
PCL PCH SP X Y A |
CC |
ROM 8K/12K/16K/24K/32K
RAM 256/384
PORT A |
PA0..PA7 (8-bit) |
|
PORT B |
PB0..PB7 (8-bit) |
|
PORT C |
PC0, PC1, PC6, PC7 |
|
PC5 |
||
|
||
TIMER |
|
|
SYSTEM |
|
|
CARRIER FREQ. |
|
|
GENERATOR |
|
|
LOW VOLTAGE |
VDD |
|
DETECTOR |
VPP |
|
|
2/5
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