Description

The GMS81C1404 and GMS81C1408 are an advanced CMOS 8-bit microcontroller with 4K/8K bytes of ROM. The Hynix semiconductor’s GMS81C1404 and GMS81C1408 are a powerful microcontroller which provides a highly flexible and cost effective solution to many small applications such as controller for battery charger. The GMS81C1404 and GMS81C1408 provide the following standard features: 4K/8K bytes of ROM, 192 bytes of RAM, 8-bit timer/counter, 8-bit A/D converter, 10-bit high speed PWM output, programmable buzzer driving port, 8-bit serial communication port, on-chip oscillator and clock circuitry. In addition, the GMS81C1404 and GMS81C1408 supports power saving modes to reduce power consump tion.

Features

• 4K/8K Bytes On-chip Program Memory

• 192 Bytes of On-chip Data RAM(Included stack memory)

• Instruction Cycle Time:

- 250nS at 8MHz

• 23 Programmable I/O pins (LED direct driving can be source and sink)

• 2.2V to 5.5V Wide Operating Range

• One 8-bit A/D Converter

• One 8-bit Basic Interval Timer

• Four 8-bit Timer / Counters

• Two 10-bit High Speed PWM Outputs

• Watchdog timer (can be operate with internal RC-oscillation)

• One 8-bit Serial Peripheral Interface

• Twelve Interrupt sources

- External input: 4

- A/D Conversion: 1

- Serial Peripheral Interface: 1

- Timer: 6

• One Programmable Buzzer Driving port

- 500Hz ~ 130kHz

• Oscillator Type

- Crystal

- Ceramic Resonator

• Noise Immunity Circuit

- Power Fail Processor

• Power Down Mode

- STOP mode

- Wake-up Timer mode