8-Bit CMOS Microcontorller

GMS97C1051/L1051

HYUNDAI MicroElectronics

21

Features

Compatible with MCS-51

1 Kbytes of programmable EPROM

4.25V to 5.5V Operating Range (GMS97C1051)

2.70V to 3.6V Operating Range (GMS97L1051)

Version for 12MHz / 24 MHz Operating frequency (GMS97C1051)

Only 12MHz Operating frequency (GMS97L1051)

Two-Level Program Memory Lock with encryption array

64 bytes SRAM

15 Programmable I/O Lines

One 16-Bit Timer/Counter

Three Interrupt Sources

Direct LED Drive Outputs

On-Chip Analog Comparator

Low Power Idle and Power Down Modes

Description

The GMS97C1051/L1051 is a high-performance CMOS 8-bit microcontroller with 1Kbytes of programmable

EPROM.

The device is compatible with the industry standard MCS-51

HYUNDAI MicroElectronics GMS97C1051/L1051 is a powerful microcontroller which provides a highly flexi-

ble and cost effective solution to many embedded control applications.

The GMS97C1051/L1051 provides the

following standard features:

1Kbytes of EPROM, 64 bytes of RAM, 15 I/O lines, 16-bit timer/counter, a three

vector two-level interrupt architecture, a precision analog comparator, on-chip oscillator and clock circuitry.

In

addition, the GMS97C1051/L1051 supports two software selectable power saving modes.

The Idle Mode stops

the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning.

The

Power Down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the

next hardware reset.

Pin Configuration

(T0) P3.4

VCC

P1.7

P1.6

P1.5

P1.4

P1.3

P1.2

P1.1 (AIN1)

P1.0 (AIN0)

P3.7

RST

P3.0

P3.1

XTAL2

XTAL1

P3.5

GND

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

PDIP/SOP