8-Bit CMOS Microcontorller

GMS97C2051/L2051

HYUNDAI MicroElectonics

1

Features

Compatible with MCS-51

2 Kbytes of programmable EPROM

4.25V to 5.5V Operating Range (GMS97C2051)

2.70V to 3.6V Operating Range (GMS97L2051)

Version for 12MHz / 24 MHz Operating frequency (GMS97C2051)

Only 12MHz Operating frequency (GMS97L2051)

Two-Level Program Memory Lock with encryption array

128 bytes SRAM

15 Programmable I/O Lines

Two 16-Bit Timer/Counters

Programmable serial USART

Five Interrupt Sources

Direct LED Drive Outputs

On-Chip Analog Comparator

Low Power Idle and Power Down Modes

Description

The GMS97C2051/L2051 is a high-performance CMOS 8-bit microcontroller with 2Kbytes of programmable

EPROM. The device is compatible with the industry standard MCS-51

DAI MicroElectronics GMS97C2051/L2051 is a powerful microcontroller which provides a highly flexible and

cost effective solution to many embedded control applications. The GMS97C2051/L2051 provides the following

standard features:

2Kbytes of EPROM, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector

two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and

clock circuitry. In addition, the GMS97C2051/L2051 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

PDIP/SOP

(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

(RXD) P3.0

(TXD) P3.1

XTAL2

XTAL1

(T1) P3.5

GND

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10