Description
The GMS81604/08 is a high-performance CMOS 8-bit microcontroller with 4K or 8K bytes of ROM. The device is one of GMS800 family. The LG Semicon GMS81604/08 is a powerful microcontroller which provides a highly flexible and cost effective solution to many embedded control applications. The GMS81604/08 provides the following standard features: 8K bytes of ROM, 256 bytes of RAM, 35 I/O lines(33 lines for 40PDIP), 16-bit or 8-bit timer/counter, a precision analog to digital converter, on-chip oscillator and clock circuitry. In addition, the GMS81604/08 supports power saving modes to reduce power consumption. The Stop Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset or external interrupt.

Features
■ 4K/ 8K On-chip Program Memory
■ 256 Bytes of On-Chip Data RAM
■ Instruction execution time: 0.5us at 8MHz
■ 2.4V to 5.5V Operating Range
■ 1~8 MHz Operating frequency
■ Basic Interval Timer
■ Four 8-Bit Timer/ Counters (can be used as two 16-bit)
■ Four external interrupt ports
■ Two Programmable Clock Out
■ One Buzzer Driving port
■ 31 Programmable I/O, 4 Input pins,
■ Twelve Interrupt Sources
■ All LED Direct Drive Output Ports
■ 8-Channel 8-Bit On-Chip Analog to Digital Converter
■ Power Fail Processor (Noise immunity circuit)
■ Power Down Mode (Stop Mode)