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 consumption.
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• 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
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Supply voltage ........................................... -0.3 to +6.0 V
Storage Temperature ..................................-40 to +125
Voltage on any pin with respect to Ground (VSS)
............................................................... -0.3 to VDD+0.3
Maximum current out of VSS pin ...........................200 mA
Maximum current into VDD pin ..............................150 mA
Maximum current sunk by (IOL per I/O Pin) ............25 mA
Maximum output current sourced by (IOH per I/O Pin)
................................................................................15 mA
Maximum current (IOL) ......................................150 mA
Maximum current (IOH)..................................... 100 mA
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Required Field 
