PIC18F4431-I/P Microchip Technology Inc., PIC18F4431-I/P Datasheet - Page 9

• Manufacturer Part Number: PIC18F4431-I/P
• Description: Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 36 I/O; 40-Pin-PDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4431-I/P

• A/d Inputs: 9-Channel, 10-Bit
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 16K Bytes
• Ram Size: 768 Bytes
• Speed: 40 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 offers the advantages of all PIC18 micro-
controllers – namely, high computational performance
at an economical price, with the addition of high endur-
ance enhanced Flash program memory and a high-
speed 10-bit A/D converter. On top of these features,
the PIC18F2331/2431/4331/4431 family introduces
design enhancements that make these microcontrol-
lers a logical choice for many high performance, power
control and motor control applications. These special
peripherals include:
• 14-bit resolution Power Control PWM Module
• Motion Feedback Module (MFM), including a
• High-speed 10-bit A/D Converter (HSADC)
The PCPWM can generate up to eight complementary
PWM outputs with dead-band time insertion. Overdrive
current is detected by off-chip analog comparators or
the digital fault inputs (FLTA, FLTB).
The MFM Quadrature Encoder Interface provides
precise rotor position feedback and/or velocity
measurement. The MFM 3 X input capture or external
interrupts can be used to detect the rotor state for
electrically commutated motor applications using Hall
Sensor feedback, such as BLDC motor drives.
PIC18F2331/2431/4331/4431 devices also feature
Flash program memory and an internal RC oscillator
with built-in LP modes.
1.1
1.1.1
All of the devices in the PIC18F2331/2431/4331/4431
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
 2003 Microchip Technology Inc.
• PIC18F2331
• PIC18F2431
(PCPWM) with programmable dead time insertion
3-channel Input Capture (IC) Module and
Quadrature Encoder Interface (QEI)
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 are
still active. In these states, power consumption
can be reduced even further, to as little as 4% of
normal operation requirements.
DEVICE OVERVIEW
New Core Features
nanoW
att
TECHNOLOGY
• PIC18F4331
• PIC18F4431
PIC18F2331/2431/4331/4431
Preliminary
• On-the-fly Mode Switching: The power-man-
• Lower Consumption in Key Modules: The
1.1.2
All of the devices in the PIC18F2331/2431/4331/4431
family offer nine different oscillator options, allowing
users a wide range of choices in developing application
hardware. These include:
• Four crystal modes, using crystals or ceramic
• Two external clock modes, offering the option of
• Two external RC oscillator modes, with the same
• An internal oscillator block, which provides an
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
aged 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 have been reduced by up to
80%, with typical values of 1.1 and 2.1 µA,
respectively.
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).
pin options as the external clock modes.
8 MHz clock and an INTRC source (approxi-
mately 31 kHz, stable over temperature and V
as well as a range of 6 user-selectable clock fre-
quencies (from 125 kHz to 4 MHz) for a total of 8
clock frequencies.
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.
This allows for code execution during what would
otherwise be the clock start-up interval, and can
even allow an application to perform routine
background activities and return to Sleep without
returning to full power operation.
MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
DS39616B-page 7
DD
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