Description
The GMS81C2112 and GMS81C2120 are advanced CMOS 8-bit microcontroller with 12K/20K bytes of ROM. These are a powerful microcontroller which provides a highly flexible and cost effective solution to many VFD applications. These provide the following standard features: 12K/20K bytes of ROM, 448 bytes of RAM, 8-bit timer/counter, 8-bit A/D converter, 10-bit High Speed PWM Output, Programmable Buzzer Driving Port, 8-bit Basic Interval Timer, 7-bit Watch dog Timer, Serial Peripheral Interface, on-chip oscillator and clock circuitry. They also come with high voltage I/O pins that can directly drive a VFD (Vacuum Fluorescent Display). In addition, the GMS81C2112 and GMS81C2120 support power saving modes to reduce power consumption.
Features
⢠20K/12K bytes ROM(EPROM)
⢠448 Bytes of On-Chip Data RAM (Including STACK Area)
⢠Minimum Instruction Execution time:
- 1uS at 4MHz (2cycle NOP Instruction)
⢠One 8-bit Basic Interval Timer
⢠One 7-bit Watch Dog Timer
⢠Two 8-bit Timer/Counters
⢠10-bit High Speed PWM Output
⢠One 8-bit Serial Peripheral Interface
⢠Two External Interrupt Ports
⢠One Programmable 6-bit Buzzer Driving Port
⢠38 I/O Lines
- 34 Programmable I/O pins
(Included 21 high-voltage pins Max. 40V)
- Three Input Only pins: 1 high-voltage pin
- One Output Only pin
⢠Eight Interrupt Sources
- Two External Sources (INT0, INT1)
- Two Timer/Counter Sources (Timer0, Timer1)
- Four Functional Sources (SPI,ADC,WDT,BIT)
⢠8-Channel 8-bit On-Chip Analog to Digital Con verter
⢠Oscillator:
- Crystal
- Ceramic Resonator
- External R Oscillator
⢠Low Power Dissipation Modes
- STOP mode
- Wake-up Timer Mode
- Standby Mode
⢠Operating Voltage: 2.7V ~ 5.5V (at 4.5MHz)
⢠Operating Frequency: 1MHz ~ 4.5MHz
⢠Enhanced EMS Improvement Power Fail Processor
(Noise Immunity Circuit)Enhanced EMS
Improvement
Power Fail Processor
(Noise Immunity Circuit)
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