PIC18F4550-I/PT Microchip Technology Inc., PIC18F4550-I/PT Datasheet - Page 9

• Manufacturer Part Number: PIC18F4550-I/PT
• Description: 44 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4550-I/PT

• A/d Inputs: 13-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 34
• Interface: I2C/SPI/UART/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

1.0
This document contains device-specific information for
the following devices:
This family of devices offers the advantages of all
PIC18 microcontrollers – namely, high computational
performance at an economical price – with the addition
of high endurance, Enhanced Flash program mem-
ory.
PIC18F2455/2550/4455/4550 family introduces design
enhancements that make these microcontrollers a log-
ical choice for many high-performance, power sensitive
applications.
1.1
1.1.1
All of the devices in the PIC18F2455/2550/4455/4550
family incorporate a range of features that can signifi-
cantly reduce power consumption during operation.
Key items include:
• Alternate Run Modes: By clocking the controller
• Multiple Idle Modes: The controller can also run
• On-the-Fly Mode Switching: The
• Low Consumption in Key Modules: The power
1.1.2
Devices in the PIC18F2455/2550/4455/4550 family
incorporate a fully featured Universal Serial Bus
communications module that is compliant with the USB
Specification Revision 2.0. The module supports both
low-speed and full-speed communication for all sup-
ported data transfer types. It also incorporates its own
on-chip transceiver and 3.3V regulator and supports
the use of external transceivers and voltage regulators.
© 2006 Microchip Technology Inc.
• PIC18F2455
• PIC18F2550
• PIC18F4455
• PIC18F4550
from the Timer1 source or the internal oscillator
block, power consumption during code execution
can be reduced by as much as 90%.
with its CPU core disabled but the peripherals still
active. In these states, power consumption can be
reduced even further, to as little as 4% of normal
operation requirements.
power-managed modes are invoked by user code
during operation, allowing the user to incorporate
power-saving ideas into their application’s
software design.
requirements for both Timer1 and the Watchdog
Timer are minimized. See Section 28.0
“Electrical Characteristics” for values.
In
DEVICE OVERVIEW
New Core Features
nanoWatt TECHNOLOGY
UNIVERSAL SERIAL BUS (USB)
addition
to
• PIC18LF2455
• PIC18LF2550
• PIC18LF4455
• PIC18LF4550
these
features,
PIC18F2455/2550/4455/4550
Preliminary
the
1.1.3
All of the devices in the PIC18F2455/2550/4455/4550
family offer twelve different oscillator options, allowing
users a wide range of choices in developing application
hardware. These include:
• Four Crystal modes using crystals or ceramic
• Four External Clock modes, offering the option of
• An internal oscillator block which provides an
• A Phase Lock Loop (PLL) frequency multiplier,
• Asynchronous dual clock operation, allowing the
Besides its availability as a clock source, the internal
oscillator block provides a stable reference source that
gives the family additional features for robust
operation:
• Fail-Safe Clock Monitor: This option constantly
• Two-Speed Start-up: This option allows the
resonators.
using two pins (oscillator input and a divide-by-4
clock output) or one pin (oscillator input, with the
second pin reassigned as general I/O).
8 MHz clock (±2% accuracy) and an INTRC
source (approximately 31 kHz, stable over
temperature and V
6 user-selectable clock frequencies, between
125 kHz to 4 MHz, for a total of 8 clock
use as an additional general purpose I/O.
available to both the High-Speed Crystal and
External Oscillator modes, which allows a wide
range of clock speeds from 4 MHz to 48 MHz.
USB module to run from a high-frequency
oscillator while the rest of the microcontroller is
clocked from an internal low-power oscillator.
monitors the main clock source against a
reference signal provided by the internal
oscillator. If a clock failure occurs, the controller is
switched to the internal oscillator block, allowing
for continued low-speed operation or a safe
application shutdown.
internal oscillator to serve as the clock source
from Power-on Reset, or wake-up from Sleep
mode, until the primary clock source is available.
frequencies. This option frees an oscillator pin for
MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
DD
), as well as a range of
DS39632C-page 7