
PIC18F2331/2431/4331/4431

28/40/44-Pin Enhanced Flash Microcontrollers with
nanoWatt Technology, High Performance PWM and A/D

14-bit Power Control PWM Module:

 Up to 4 channels with complementary outputs
 Edge- or center-aligned operation
 Flexible dead-band generator
 Hardware fault protection inputs
 Simultaneous update of duty cycle and period:
  - Flexible special event trigger output

Motion Feedback Module:

 Three independent input capture channels:
  - Flexible operating modes for period and pulse
    width measurement
  - Special Hall Sensor interface module
  - Special event trigger output to other modules
 Quadrature Encoder Interface:
  - 2 phase inputs and one index input from encoder
  - High and low position tracking with direction
    status and change of direction interrupt
  - Velocity measurement

High-Speed, 200 Ksps 10-bit A/D Converter:

 Up to 9 channels
 Simultaneous two-channel sampling
 Sequential sampling: 1, 2 or 4 selected channels
 Auto-conversion capability
 4-word FIFO with selectable interrupt frequency
 Selectable external conversion triggers
 Programmable acquisition time
  Flexible Oscillator Structure:
 Four crystal modes up to 40 MHz
 Two external clock modes up to 40 MHz
 Internal oscillator block:
  - 8 user selectable frequencies: 31 kHz to 8 MHz
  - OSCTUNE can compensate for frequency drift
 Secondary oscillator using Timer1 @ 32 kHz
 Fail-Safe Clock Monitor:
  - Allows for safe shutdown of device if clock fails

Power-Managed Modes:

 Run CPU on, peripherals on
 Idle CPU off, peripherals on
 Sleep CPU off, peripherals off
 Idle mode currents down to 5.8 A typical
 Sleep current down to 0.1 A typical
 Timer1 oscillator, 1.8 A typical, 32 kHz, 2V
 Watchdog Timer (WDT), 2.1 A typical
 Two-Speed oscillator start-up

Peripheral Highlights:

 High current sink/source 25 mA/25 mA
 Three external interrupts
 Two Capture/Compare/PWM (CCP) modules:
  - Capture is 16-bit, max. resolution 6.25 ns (TCY/16)
  - Compare is 16-bit, max. resolution 100 ns (TCY)
  - PWM output: PWM resolution is 1 to 10 bits
 Enhanced USART module:
  - Supports RS-485, RS-232 and LIN 1.2
  - Auto-Wake-up on Start bit
  - Auto-Baud detect
 RS-232 operation using internal oscillator block
  (no external crystal required)

Special Microcontroller Features:

 100,000 erase/write cycle enhanced Flash
  program memory typical
 1,000,000 erase/write cycle data EEPROM
  memory typical
 Flash/data EEPROM retention: 100 years
 Self-programmable under software control
 Priority levels for interrupts
 8 X 8 Single-cycle Hardware Multiplier
 Extended Watchdog Timer (WDT):
  - Programmable period from 41 ms to 131s
 Single-supply In-Circuit Serial Programming
  (ICSP) via two pins
 In-Circuit Debug (ICD) via two pins
  - Drives PWM outputs safely when debugging
