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Device | Program Memory | Data Memory | I/O | Comparators | Low Frequency Analog Front-End | |
Flash (words) | SRAM (bytes) | EEPROM (bytes) | ||||
PIC12F635 | 1024 | 64 | 128 | 6 | 1 | N |
PIC16F636 | 2048 | 128 | 256 | 12 | 2 | N |
PIC16F639 | 2048 | 128 | 256 | 12 | 2 | Y |
High-Performance RISC CPU:
• Only 35 instructions to learn:
- All single-cycle instructions except branches
Operating speed:
- DC – 20 MHz oscillator/clock input
- DC – 200 ns instruction cycle
Interrupt capability
8-level deep hardware stack
Direct, Indirect and Relative Addressing modes
Special Microcontroller Features:
PrecisionInternalOscillator:
- Factorycalibratedto±1%,typical
- Softwareselectablefrequencyrangeof
8 MHz to 125 kHz
- Softwaretunable
- Two-SpeedStart-upmode
- Crystalfaildetectforcriticalapplications
- Clockmodeswitchingduringoperationfor
power savings
Clockmodeswitchingforlow-poweroperation
Power-SavingSleepmode
Wideoperatingvoltagerange(2.0V-5.5V)
IndustrialandExtendedTemperaturerange
Power-onReset(POR)
Wake-upReset(WUR)
Independent weak pull-up/pull-down resistors
ProgrammableLow-VoltageDetect(PLVD)
Power-upTimer(PWRT)andOscillatorStart-up
Timer (OST)
Brown-outReset(BOR)withsoftwarecontrol
option
EnhancedLow-CurrentWatchdogTimer(WDT)
with on-chip oscillator (software selectable nominal 268 seconds with full prescaler) with software enable
MultiplexedMasterClearwithpull-up/inputpin
Programmablecodeprotection(programand
data independent)
High-EnduranceFlash/EEPROMcell:
- 100,000 write Flash endurance
- 1,000,000 write EEPROM endurance
- Flash/Data EEPROM Retention: > 40 years
Automotive, Industrial, Consumer Electronics