Description

The GMS81C3004 is an advanced CMOS 8-bit microcontroller with 4K bytes of ROM. The device is one of GMS800 family. The LG Semicon GMS81C3004 is a powerful microcontroller which provides a highly flexible and cost effective solution to many LCD applications such as controller with LCD and toys. The GMS81C3004 provides the following standard features: 4K bytes of ROM, 256 bytes of RAM, 8-bit timer/counter, on-chip oscillator and clock circuitry. In addition, the GMS81C3004 supports power saving modes to reduce power consumption.

Features

• 4K Bytes On-chip Program Memory

• 256 Bytes of On-chip Data RAM (Included 64 bytes stack memory)

• Dot Matrix LCD Driver

- Max. 320 dots (40 seg. x 8 com.)

- 40 bytes of Display RAM

• Instruction Cycle Time:

- 0.5us, 1.9us, 3.8us, 15.2us at 4.19MHz

- 61us, 244us, 488us, 1.95ms at 32.768KHz

• 51 Programmable I/O pins (Included 32 LCD pins)

• 2.2V to 5.5V Wide Operating Range

• Dual Clock Operation (4.19MHz, 32kHz)

• One 8-bit Basic Interval Timer

• Key Scan

• One 8-bit Timer/ Counter

• Watch Timer

• Watchdog timer

• Eight Interrupt sources

- External input: 3

- Keyscan input: 1

- Timer: 4

• Buzzer Driving port

- 500Hz ~ 130kHz

• 4-channel 5-bit On-chip Comparator

• Power Down Mode

- STOP mode

- SLEEP mode