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HMS81C2012A Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part No. HMS81C2012A
Description  CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
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Maker  ETC1 [List of Unclassifed Manufacturers]
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HMS81C2012A Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

 
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HMS81C2012A/2020A
SEP. 2004 Ver 2.00
1
HMS81C2012A/HMS81C2020A
CMOS Single-Chip 8-Bit Microcontroller
with A/D Converter & VFD Driver
1. OVERVIEW
1.1 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 convert-
er, 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.
1.2 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)
Device name
ROM Size
RAM Size
OTP
Package
HMS81C2012A
12K bytes
448 bytes
-
64SDIP, 64MQFP,
64LQFP
HMS81C2020A
20K bytes
GMS87C2020


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