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:
Precision Internal Oscillator: - Factory calibrated to ±1%, typical - Software selectable frequency range of 8 MHz to 125 kHz - Software tunable - Two-Speed Start-up mode - Crystal fail detect for critical applications - Clock mode switching during operation for power savings
Clock mode switching for low-power operation
Power-Saving Sleep mode
Wide operating voltage range (2.0V-5.5V)
Industrial and Extended Temperature range
Power-on Reset (POR)
Wake-up Reset (WUR)
Independent weak pull-up/pull-down resistors
Programmable Low-Voltage Detect (PLVD)
Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
Brown-out Reset (BOR) with software control option
Enhanced Low-Current Watchdog Timer (WDT) with on-chip oscillator (software selectable nominal 268 seconds with full prescaler) with software enable
Multiplexed Master Clear with pull-up/input pin
Programmable code protection (program and data independent)
6/12 I/O pins with individual direction control: - High-current source/sink for direct LED drive - Interrupt-on-change pin - Individually programmable weak pull-ups/ pull-downs - Ultra Low-Power Wake-up
Analog Comparator module with: - Up to two analog comparators - Programmable On-chip Voltage Reference (CVREF) module (% of VDD) - Comparator inputs and outputs externally accessible
Timer0: 8-bit timer/counter with 8-bit programmable prescaler
Enhanced Timer1: - 16-bit timer/counter with prescaler - External Timer1 Gate (count enable) - Option to use OSC1 and OSC2 in LP mode as Timer1 oscillator if INTOSC mode selected
KEELOQ® compatible hardware Cryptographic module
In-Circuit Serial Programming™ (ICSP™) via two pins Low-Frequency Analog Front-End Features (PIC16F639 only):
Three input pins for 125 kHz LF input signals
High input detection sensitivity (3 mVPP, typical)
Demodulated data, Carrier clock or RSSI output selection
Input carrier frequency: 125 kHz, typical
Input modulation frequency: 4 kHz, maximum
8 internal Configuration registers
Bidirectional transponder communication (LF talk back)
Programmable antenna tuning capacitance (up to 63 pF, 1 pF/step)
