PIC18F2550 28-Pin High-Performance USB Microcontroller
28-pin high-performance USB 2.0 Full-Speed microcontroller with 32KB Flash, 2048 bytes RAM, 256 bytes EEPROM, 10-bit ADC, CCP/PWM, and nanoWatt power management.
Aliase:PIC18F2550-I/SP, 18F2550, USB PIC MCU
DIP-28 Top View
28 Pins
Pinout Table28
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | ~MCLR/VPP/RE3 | Digital | Master Clear Reset / Programming Voltage / Port E Bit 3 |
| 2 | RA0/AN0 | Analog | Port A Bit 0 / Analog Input Channel 0 |
| 3 | RA1/AN1 | Analog | Port A Bit 1 / Analog Input Channel 1 |
| 4 | RA2/AN2/VREF- | Analog | Port A Bit 2 / Analog Input 2 / Voltage Reference Negative |
| 5 | RA3/AN3/VREF+ | Analog | Port A Bit 3 / Analog Input 3 / Voltage Reference Positive |
| 6 | RA4/T0CKI/C1OUT | Digital | Port A Bit 4 / Timer 0 Clock Input / Comparator 1 Output |
| 7 | RA5/AN4/~SS | Digital | Port A Bit 5 / Analog Input 4 / SPI Slave Select |
| 8 | VSS | Ground | System Ground (0V) |
| 9 | OSC1/CLKI | Digital | Oscillator Crystal Input / External Clock Input |
| 10 | OSC2/CLKO/RA6 | Digital | Oscillator Crystal Output / Clock Out / Port A Bit 6 |
| 11 | RC0/T1OSO/T13CKI | Digital | Port C Bit 0 / Timer 1 Oscillator Out / Timer 1/3 Clock |
| 12 | RC1/T1OSI/CCP2 | Digital | Port C Bit 1 / Timer 1 Oscillator In / Capture Compare PWM 2 |
| 13 | RC2/CCP1 | Digital | Port C Bit 2 / Capture Compare PWM 1 |
| 14 | VUSB | Power | Internal USB 3.3V Regulator Filter Capacitor / External Supply |
| 15 | RC4/D-/VM | Digital | Port C Bit 4 / USB Differential Data Line D- |
| 16 | RC5/D+/VP | Digital | Port C Bit 5 / USB Differential Data Line D+ |
| 17 | RC6/TX/CK | Digital | Port C Bit 6 / USART Asynchronous Transmit / Synchronous Clock |
| 18 | RC7/RX/DT/SDO | Digital | Port C Bit 7 / USART Asynchronous Receive / SPI Data Out |
| 19 | VSS | Ground | System Ground (0V) |
| 20 | VDD | Power | Positive Power Supply (+4.2V to +5.5V) |
| 21 | RB0/AN12/INT0/SDA | Digital | Port B Bit 0 / External Interrupt 0 / I2C Data |
| 22 | RB1/AN10/INT1/SCL | Digital | Port B Bit 1 / External Interrupt 1 / I2C Clock |
| 23 | RB2/AN8/INT2 | Digital | Port B Bit 2 / Analog Input 8 / External Interrupt 2 |
| 24 | RB3/AN9/CCP2 | Digital | Port B Bit 3 / Analog Input 9 / CCP2 Alternate Out |
| 25 | RB4/AN11/KBI0 | Digital | Port B Bit 4 / Interrupt-on-Change Pin 0 |
| 26 | RB5/KBI1/PGM | Digital | Port B Bit 5 / Low-Voltage ICSP Programming Enable |
| 27 | RB6/KBI2/PGC | Digital | Port B Bit 6 / In-Circuit Debugger Clock / ICSP Clock |
| 28 | RB7/KBI3/PGD | Digital | Port B Bit 7 / In-Circuit Debugger Data / ICSP Data |