Description

The GMS81C50 Series is an advanced CMOS 8-bit microcontroller with 16K/24K/32K bytes of ROM. The device is one of GMS800 family. The LG Semicon GMS81C50 Series is a powerful microcontroller which provides a highly flexible and cost effective solution to many UR & Keyboard applications. The GMS81C50 Series provides the following standard features: 16K/24K/32K bytes of ROM, 448 bytes of RAM, 8-bit timer/counter, on-chip oscillator and clock circuitry. In addition, the GMS81C50 Series supports power saving modes to reduce power consumption.

Features

? Instruction Cycle Time:

- 1us at 4MHz

? Programmable I/O pins

? Operating Voltage

- 2.2 ~ 4.0 V @ 4MHz

? Timer

- Timer / Counter ......... 16 Bit * 1 ch

......... 8 Bit * 2 ch

- Basic Interval Timer ...... 8 Bit * 1 ch

- Watch Dog Timer ............ 6Bit * 1ch

? 8 Interrupt sources

* Nested Interrupt control is available.

- External input: 2

- Keyscan input

- Basic Interval Timer

- Watchdog timer

- Timer : 3

? Power On Reset

? Power saving Operation Modes

- STOP

- SLEEP

? Low Voltage Detection Circuit

? Watch Dog Timer Auto Start (During 1second after Power on Reset)