PIC18F2550 – Supports USB 2.0 full 12Mbps speed


Ideal for low power (nanoWatt) and connectivity applications that benefit from the availability of three serial ports: FS-USB(12Mbit/s), I²C™ and SPI™ (up to 10 Mbit/s) and an asynchronous (LIN capable) serial port (EUSART). Large amounts of RAM memory for buffering and Enhanced Flash program memory make it ideal for embedded control and monitoring applications that require periodic connection with a (legacy free) personal computer via USB for data upload/download and/or firmware updates.




  • Universal Serial Bus Features:

    • USB V2.0 Compliant
    • Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)
    • Supports Control, Interrupt, Isochronous and Bulk Transfers
    • Supports up to 32 endpoints (16 bidirectional)
    • 1-Kbyte dual access RAM for USB
    • On-chip USB transceiver with on-chip voltage regulator
    • Interface for off-chip USB transceiver
    • Streaming Parallel Port (SPP) for USB streaming transfers (40/44-pin devices only)
  • 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 μA typical
    • Sleep mode currents down to 0.1 μA typical
    • Timer1 oscillator: 1.1 μA typical, 32 kHz, 2V
    • Watchdog Timer: 2.1 μA typical
    • Two-Speed Oscillator Start-up Flexible Oscillator Structure:
    • Four Crystal modes including High Precision PLL for USB
    • Two External Clock modes, up to 48 MHz
    • Internal oscillator block:
      – 8 user-selectable frequencies, from 31 kHz to 8 MHz
      – User-tunable to compensate for frequency drift
    • Secondary oscillator using Timer1 @ 32 kHz
    • Dual oscillator options allow microcontroller and USB module to run at different clock speeds
    • Fail-Safe Clock Monitor
      – Allows for safe shutdown if any clock stops
  • Peripheral Highlights:

    • High-current sink/source 25 mA/25 mA
    • Three external interruptsFour Timer modules (Timer0 to Timer3)
    • Up to 2 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-bit
    • Enhanced Capture/Compare/PWM (ECCP) module:
      – Multiple output modes
      – Selectable polarity
      – Programmable dead time
      – Auto-Shutdown and Auto-Restart
    • Enhanced USART module:
      – LIN bus support
    • Master Synchronous Serial Port (MSSP) module supporting 3-wire SPI™ (all 4 modes) and I2C™ Master and Slave modes
    • 10-bit, up to 13-channels Analog-to-Digital Converter module (A/D) with programmable acquisition time
    • Dual analog comparators with input multiplexing Special Microcontroller Features:
    • C compiler optimized architecture with optional extended instruction set
    • 100,000 erase/write cycle Enhanced Flash program memory typical
    • 1,000,000 erase/write cycle Data EEPROM memory typical
    • Flash/Data EEPROM Retention: > 40 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
    • Programmable Code Protection
    • Single-Supply 5V In-Circuit Serial Programming™ (ICSP™) via two pins
    • In-Circuit Debug (ICD) via two pins
    • Optional dedicated ICD/ICSP port (44-pin devices only)
    • Wide operating voltage range (2.0V to 5.5V)


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