28/40/44-pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
This data sheet describes the PIC18F2331/2431/4331/4431 family of 28/40/44‑pin enhanced‑flash microcontrollers featuring nanoWatt technology, high‑performance PWM, and a 10‑bit high‑speed A/D converter. It includes detailed information on device architecture, oscillator options, power‑managed modes, and peripheral modules.
Key sections cover the 14‑bit Power Control PWM module, Motion Feedback module, 8×8 hardware multiplier, various timer modules, SSP and EUSART interfaces, as well as electrical characteristics, packaging information, and migration guides for developers.
| Idle mode current | 5.8 µA typical |
|---|---|
| Sleep mode current | 0.1 µA typical |
| A/D converter speed | 200 ksps 10‑bit |
| Number of A/D channels | Up to 9 channels |
| Crystal oscillator frequency range | Up to 40 MHz |
| Internal oscillator frequencies | 8 selectable frequencies from 31 kHz to 8 MHz |
| PWM channel count | Up to 4 channels with complementary outputs |
| Current sink/source per I/O pin | 25 mA |
Microchip states that code protection is not guaranteed to be unbreakable and that attempts to bypass it may violate the Digital Millennium Copyright Act.
They support single‑supply In‑Circuit Serial Programming (ICSP) using two pins.
The flash memory is rated for 100,000 erase/write cycles, while the data EEPROM is rated for 1,000,000 cycles.