以下是我們僅針對GMS81C2020單片機的主要性能特征進行分析介紹，供廣大客戶參考借鑒。
The GMS81C2020 and GMS81C2120 are an advanced CMOS 8-bit microcontroller with 20K/12K 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: 20K/12K 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,8-bit, 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 GMS81C2020 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
60 I/O Lines
- 56 Programmable I/O pins :
30 high-voltage pins (40V,max)
- 3 Input Only pins : 1 high-voltage pin
- 1 Output Only pin
Eight Interrupt Sources
- 2 By External Sources (INT0, INT1)
- 2 By Timer/Counter Sources (Timer0, Timer1)
- 4 By Functional Sources (SPI,ADC,WDT,BIT)
12-Channel 8-Bit On-Chip Analog to Digital Converter
Oscillatior :
- Crystal
- Ceramic Resonator
- External RC Oscillator
- Internal RCWDT Oscillatior
Low Power Dissipation Modes
- STOP mode
- Wake-up Timer Mode
- Standby Mode
- Watch Mode
- Subactive Mode
Operating Voltage : 4.0V ~ 5.5V (at 4.5MHz)
Operating Frequency : 0.4MHz ~ 4.5MHz
Subclock : 32.768KHz Crystal Oscillator
Enhanced EMS Improvement
Power Fail Processor
( Noise Immunity Circuit )