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

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

Specifications of PIC18F4550-I/ML

• 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 QFN
• 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
performance at an economical price – with the addition of
high endurance, Enhanced Flash program memory. In
addition to these features, the PIC18F2450/4450 family
introduces design enhancements that make these micro-
controllers a logical choice for many high-performance,
power sensitive applications.
1.1
1.1.1
All of the devices in the PIC18F2450/4450 family
incorporate a range of features that can significantly
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 power-
• Low Consumption in Key Modules: The
1.1.2
Devices in the PIC18F2450/4450 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 supported 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.
• PIC18F2450
from the Timer1 source or the internal RC
oscillator, 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.
managed modes are invoked by user code during
operation, allowing the user to incorporate power-
saving ideas into their application’s software
design.
power requirements for both Timer1 and the
Watchdog Timer are minimized. See
Section 21.0 “Electrical Characteristics” for
values.
DEVICE OVERVIEW
New Core Features
nanoWatt TECHNOLOGY
UNIVERSAL SERIAL BUS (USB)
–
namely,
• PIC18F4450
high
computational
Advance Information
1.1.3
All of the devices in the PIC18F2450/4450 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 INTRC source (approximately 31 kHz, stable
• A Phase Lock Loop (PLL) frequency multiplier,
• Asynchronous dual clock operation, allowing the
The internal oscillator 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).
over temperature and V
oscillator pin for 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, 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.
PIC18F2450/4450
MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
DD
). This option frees an
DS39760A-page 7