 2003 Microchip Technology Inc.

Advance Information

DS39617A-page 1

PIC18F2455/2550/4455/4550

Universal Serial Bus Features:

• USB V2.0 Compliant SIE

• 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)

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

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

Peripheral Highlights:

• High current sink/source: 25 mA/25 mA

• Three external interrupts

• Four Timer modules (Timer0 to Timer3)

• Up to 2 Capture/Compare/PWM (CCP) modules:

- 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

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

• Wide operating voltage range (2.0V to 5.5V)

Device

Program Memory

Data Memory

I/O

10-bit

A/D

(ch)

CCP/

ECCP

(PWM)

SPP

MSSP

Timers

8/16-bit

FLASH

(bytes)

# Single-

Word

Instructions

SRAM

(bytes)

EEPROM

(bytes)

SPI

Master

PIC18F2455

24K

12288

2048

256

24

10

2/0

No

Y

Y

1

2

1/3

PIC18F2550

32K

16384

2048

256

24

10

2/0

No

Y

Y

1

2

1/3

PIC18F4455

24K

12288

2048

256

35

13

1/1

Yes

Y

Y

1

2

1/3

PIC18F4550

32K

16384

2048

256

35

13

1/1

Yes

Y

Y

1

2

1/3

28/40/44-Pin High-Performance, Enhanced Flash USB

Microcontrollers with nanoWatt Technology