PIC18F2455/2550/4455/4550
28/40/44-Pin High-Performance, Enhanced Flash USB
Microcontrollers with nanoWatt Technology
Universal Serial Bus Features:
Peripheral Highlights:
• USB V2.0 Compliant SIE
• High current sink/source: 25 mA/25 mA
• Three external interrupts
• 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-board 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)
• Four 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
• Addressable 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
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 current 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
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
Flexible Oscillator Structure:
• Five Crystal modes, including High-Precision PLL
for USB
• 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
- User tunable to compensate for frequency drift
• Secondary oscillator using Timer1 @ 32 kHz
• Fail-Safe Clock Monitor
- Allows for safe shutdown if any clock stops
• In-Circuit Debug (ICD) via two pins
• Wide operating voltage range (2.0V to 5.5V)
Program Memory
Data Memory
MSSP
10-bit CCP/
A/D ECCP SPP
(ch) (PWM)
Timers
8/16-bit
# Single-
FLASH
Device
I/O
SRAM EEPROM
(bytes) (bytes)
Master
I C
Word
SPI
2
(bytes)
Instructions
PIC18F2455
PIC18F2550
PIC18F4455
PIC18F4550
24K
32K
24K
32K
12288
16384
12288
16384
2048
2048
2048
2048
256
256
256
256
24
24
35
35
10
10
13
13
2/0
2/0
1/1
1/1
No
No
Y
Y
Y
Y
Y
Y
Y
Y
1
1
1
1
2
2
2
2
1/3
1/3
1/3
1/3
Yes
Yes
2003 Microchip Technology Inc.
Advance Information
DS39617A-page 1
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