PIC18F4321-I/PT

Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

Key features

• 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 Currents Down to 500 nA Typical
• Timer1 Oscillator: 1.8 μAᵢ, 32 kHz, 2V Typical
• Watchdog Timer: 1.6 μA, 2V Typical
• Two-Speed Oscillator Start-up
• 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 α32 kHz
• Fail-Safe Clock Monitor - Allows for safe shutdown if peripheral clock stops
• 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