[MagnaChip]
Description
The HMS81C2012A and HMS81C2020Aare 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 HMS81C2012A and HMS81C2020A 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
• 57 I/O Lines
- 56 Programmable I/O pins (Included 30 high-voltage pins Max. 40V)
- 1 Input only pin (high-voltage pin)
• Eight Interrupt Sources
- Two External Sources (INT0, INT1)
- Two Timer/Counter Sources (Timer0, Timer1)
- Four Functional Sources (SPI,ADC,WDT,BIT)
• 12-Channel 8-bit On-Chip Analog to Digital Converter
• Oscillator:
- Crystal
- Ceramic Resonator
- External R Oscillator
• Low Power Dissipation Modes
- STOP mode
- Wake-up Timer Mode
- Standby Mode
- Watch Mode
- Sub-active Mode
• Operating Voltage:
2.7V ~ 5.5V (@ 1M ~ 6MHz)
4.5V ~ 5.5V (@ 1M ~ 8MHz)
• Sub-clock: 32.768KHz Crystal Oscillator
• Enhanced EMS Improvement Power Fail Processor (Noise Immunity Circuit)