December 1997

1/5

This is preliminary information ona new product in development orundergoing evaluation. Details are subject to change without notice.

R

ST7291L

8-BIT MCU WITH 8/12/16/24 /32K ROM, TIMER, SUPPLY

SUPERVISOR AND CARRIER FREQUENCY GENERATOR

BRIEF DATA

s

2 to 5.5V Supply Operating Range

s

8MHz Maximum Clock Frequency

s

Fully Static Operation

s

0to +70

°C Operating Temperature Range

s

Run, Wait, Stop and RAM Retention modes

s

User ROM: 12/16/24/ 32 Kbytes

s

Data RAM:

256/384 bytes

s

28 pin SO Plastic Packages

s

21 Bidirectional I/O lines

s

8 standard Push-pull I/Os with wake-up feature

13 standard Push-pull I/Os

s

16-bit Timer with Output Compare (no output

pin)

s

Low Voltage Detector (LVD)

s

Interrupt Wake-up function

s

IR Carrier Frequency Generator

s

8-bit Data Manipulation

s

63 Basic Instructions

s

17 main Addressing Modes

s

8x8 Unsigned Multiply instruction

s

True Bit Manipulation

s

Complete Development Support on PC/DOS/

Windows 3.1x/95/NT with Real-Time Emulator

s

Full

Software

Package

(Cross -Assembler,

Debugger)

s

Full Hardware Emulator

s

EPROM and OTP support

DEVICE SUMMARY

Note 1. This device is in development, consult your

SGS-TH OMSON representative for the current status.

Figure 1. Pin Description

Notes:

1. PC1 on ST7291L2/L3/L4; software selectable as OP on

ST7291L6/L5/L5A

DEVICE

ROM

(Bytes)

RAM

(Bytes)

CARRIER

GENERATOR

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)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

RESET

WKP

PA7

PA6

PA1

PC0

PA5

PA4

PA3

OSCin

OSCout

PC6

PC7

PB6

PB5

PB4

PB3

PB2

28

27

26

25

24

23

22

21

PA2

PA0

PB0

PB1

TEST

PC5

PB7

1