
PIC18F2525/2620/4525/4620

28/40/44-Pin Enhanced Flash Microcontrollers with
10-Bit A/D and nanoWatt Technology

Power Managed Modes:

• Run: CPU on, peripherals on
• Idle: CPU off, peripherals on
• Sleep: CPU off, peripherals off
• Idle mode currents down to 2.5 µA typical
• Sleep mode current down to 100 nA typical
• Timer1 Oscillator: 1.8 µA, 32 kHz, 2V
• Watchdog Timer: 1.4 µA, 2V typical
• Two-Speed Oscillator Start-up

Flexible Oscillator Structure:

• Four Crystal modes, up to 40 MHz
• 4x Phase Lock Loop (PLL) – available for crystal
  and internal oscillators)
• Two External RC modes, up to 4 MHz
• Two External Clock modes, up to 40 MHz
• Internal oscillator block:
  - 8 user selectable frequencies, from 31 kHz to
  8 MHz
  - Provides a complete range of clock speeds
  from 31 kHz to 32 MHz when used with PLL
  - User tunable to compensate for frequency drift
• Secondary oscillator using Timer1 @ 32 kHz
• Fail-Safe Clock Monitor
  - Allows for safe shutdown if peripheral clock stops

Peripheral Highlights:

• High-current sink/source 25 mA/25 mA
• Three programmable external interrupts
• Four input change interrupts
• Up to 2 Capture/Compare/PWM (CCP) modules,
  one with Auto-Shutdown (28-pin devices)
• Enhanced Capture/Compare/PWM (ECCP)
  module (40/44-pin devices only):
  - One, two or four PWM outputs
  - Selectable polarity
  - Programmable dead time
  - Auto-Shutdown and Auto-Restart
• Master Synchronous Serial Port (MSSP) module
  supporting 3-wire SPI™ (all 4 modes) and I2C™
  Master and Slave modes
• Enhanced Addressable USART module:
  - Supports RS-485, RS-232 and LIN 1.2
  - RS-232 operation using internal oscillator
  block (no external crystal required)
  - Auto-Wake-up on Start bit
  - Auto-Baud Detect
• 10-bit, up to 13-channel Analog-to-Digital
  Converter module (A/D):
  - Auto-acquisition capability
  - Conversion available during Sleep
• Dual analog comparators with input multiplexing
• Programmable 16-level High/Low-Voltage
  Detection (HLVD) module:
  - Supports interrupt on High/Low-Voltage Detection

Special Microcontroller Features:

• C compiler optimized architecture:
  - Optional extended instruction set designed to
    optimize re-entrant code
• 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 typical
• Self-programmable under software control
• Priority levels for interrupts
• 8 x 8 Single Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
  - Programmable period from 4 ms to 131s
• Single-supply 5V In-Circuit Serial
  Programming™ (ICSP™) via two pins
• In-Circuit Debug (ICD) via two pins
• Wide operating voltage range: 2.0V to 5.5V
• Programmable Brown-out Reset (BOR) with
  software enable option
