Description
The GMS81508B/16B/24B are advanced CMOS 8-bit microcontrollers with 8K/16K/24K bytes of ROM. The device is one of GMS800 family. This device using the GMS800 family CPU includes several peripheral functions such as Timer, A/D converter, Programmable buzzer driver, Serial I/O communication, Pulse Width Modulation function, etc. The RAM, ROM, and I/O are placed on the same memory map in addition to simple instruction set.

FEATUREs
• 8K/16K/24K Bytes On-chip Program Memory
• 448 Bytes of On-chip Data RAM (Included stack memory)
• Minimum Instruction Execution Time 0.5µs at 8MHz
• One 8-bit Basic Interval Timer
• Four 8-bit Timer/Event counter or Two 16-bit Timer/Event counter
• One 6-bit Watchdog timer
• Eight channel 8-bit A/D converter
• Two channel 8-bit PWM
• One 8-bit Serial Communication Interface
• Four External Interrupt input ports
• Buzzer Driving port
    - 500Hz ~ 250kHz@8MHz
• 52 I/O Ports, 4 Input Ports
• Twelve Interrupt sources
    - Basic Interval Timer: 1
    - External input: 4
    - Timer/Event counter: 4
    - ADC: 1
    - Serial Interface: 1
    - WDT: 1
• Built in Noise Immunity Circuit
    - Noise filter
    - Power fail processor
• Power Down Mode
    - STOP mode
• 2.2V to 5.5V Wide Operating Range
• 1~10MHz Wide Operating Frequency
• 64SDIP, 64MQFP, 64LQFP package types
• Available 16K, 24K bytes OTP version