Description
The GMS87C1102 and GMS87C1202 are an advanced CMOS 8-bit microcontroller with 2K bytes of ROM. The HYUNDAI MicroElectronics GMS87C1102 and GMS87C1202 are a powerful microcontroller which provides a highly flexible and cost effective solution to many small applications. The GMS87C1102 and GMS87C1202 provide the following standard features: 2K bytes of ROM(OTP), 128 bytes of RAM, 8-bit timer/counter, 8-bit A/D converter, 10-bit High Speed PWM Output, Programmable Buzzer Driving Port (GMS87C1202 only), on-chip oscillator and clock circuitry. In addition, the GMS87C1102 and GMS87C1202 support power saving modes to reduce power consumption.

Features
• 2K bytes On-chip Program Memory
• 128 Bytes of On-Chip Data RAM
• Minimum Instruction execution time:
    - 500ns at 8MHz (2cycle NOP Instruction)
• 2.7V to 6.0V Wide Operating Range
• Basic Interval Timer
• Two 8-Bit Timer/ Counters
• 10-Bit High Speed PWM Output
• Two external interrupt ports (GMS87C1102 has one external interrupt port)
• One Programmable Buzzer Driving port (GMS87C1202 only)
• 15 Programmable I/O Lines (GMS87C1102 has 11 programmable I/O lines)
• Seven Interrupt Sources (GMS87C1102 has Six interrupt sources)
• 8-Channel 8-Bit On-Chip Analog to Digital Converter
• Watch dog timer
• Oscillation :
    - Crystal
    - Ceramic Resonator
    - External Oscillator
    - RC Oscillation
• Power Down Mode
    - STOP mode
    - Wake-up Timer mode
    - RC-WDT mode
• Power Fail Processor ( Noise Immunity Circuit )