PIC18F2331/2431/4331/4431
Data Sheet
28/40/44-Pin Enhanced
Flash Microcontrollers
with nanoWatt Technology,
High Performance PWM and A/D
2003 Microchip Technology Inc.
Preliminary
DS39616B
Note the following details of the code protection feature on Microchip devices:
•
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
•
•
•
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical
components in life support systems is not authorized except
with express written approval by Microchip. No licenses are
conveyed, implicitly or otherwise, under any intellectual
property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EE
L
OQ
, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE and PowerSmart are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
AmpLab, FilterLab, microID, MXDEV, MXLAB, PICMASTER,
SEEVAL, SmartShunt and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Application Maestro, dsPICDEM, dsPICDEM.net,
dsPICworks, ECAN, ECONOMONITOR, FanSense,
FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,
ICEPIC, microPort, Migratable Memory, MPASM, MPLIB,
MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net, PICtail,
PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPIC,
Select Mode, SmartSensor, SmartTel and Total Endurance
are trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2003, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in October
2003 . The Company’s quality system processes and procedures are
for its PICmicro
®
8-bit MCUs, K
EE
L
OQ
®
code hopping devices, Serial
EEPROMs, microperipherals, non-volatile memory and analog
products. In addition, Microchip’s quality system for the design and
manufacture of development systems is ISO 9001:2000 certified.
DS39616B-page ii
Preliminary
2003 Microchip Technology Inc.
PIC18F2331/2431/4331/4431
28/40/44-Pin Enhanced Flash Microcontrollers with
nanoWatt Technology, High Performance PWM and A/D
14-bit Power Control PWM Module:
•
•
•
•
•
Up to 4 channels with complementary outputs
Edge- or center-aligned operation
Flexible dead-band generator
Hardware fault protection inputs
Simultaneous update of duty cycle and period:
- Flexible special event trigger output
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, 1.8
µA
typical, 32 kHz, 2V
Watchdog Timer (WDT), 2.1
µA
typical
Two-Speed oscillator start-up
Motion Feedback Module:
• Three independent input capture channels:
- Flexible operating modes for period and pulse
width measurement
- Special Hall Sensor interface module
- Special event trigger output to other modules
• Quadrature Encoder Interface:
- 2 phase inputs and one index input from encoder
- High and low position tracking with direction
status and change of direction interrupt
- Velocity measurement
Peripheral Highlights:
• High current sink/source 25 mA/25 mA
• Three external interrupts
• Two Capture/Compare/PWM (CCP) modules:
- Capture is 16-bit, max. resolution 6.25 ns (T
CY
/16)
- Compare is 16-bit, max. resolution 100 ns (T
CY
)
- PWM output: PWM resolution is 1 to 10 bits
• Enhanced USART module:
- Supports RS-485, RS-232 and LIN 1.2
- Auto-Wake-up on Start bit
- Auto-Baud detect
• RS-232 operation using internal oscillator block
(no external crystal required)
High-Speed, 200 Ksps 10-bit A/D Converter:
•
•
•
•
•
•
•
Up to 9 channels
Simultaneous two-channel sampling
Sequential sampling: 1, 2 or 4 selected channels
Auto-conversion capability
4-word FIFO with selectable interrupt frequency
Selectable external conversion triggers
Programmable acquisition time
Special Microcontroller Features:
• 100,000 erase/write cycle enhanced Flash
program memory typical
• 1,000,000 erase/write cycle data EEPROM
memory typical
• Flash/data EEPROM retention: 100 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
• Single-supply In-Circuit Serial Programming™
(ICSP™) via two pins
• In-Circuit Debug (ICD) via two pins
- Drives PWM outputs safely when debugging
SSP
10-bit
A/D CCP
Slave EUSART
SPI
2
(ch)
I C™
5
5
9
9
2
2
2
2
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Quadrature
Encoder
14-bit
PWM
(ch)
6
6
8
8
Flexible Oscillator Structure:
• Four crystal modes up to 40 MHz
• Two external clock modes up to 40 MHz
• Internal oscillator block:
- 8 user selectable frequencies: 31 kHz to 8 MHz
- OSCTUNE can compensate for frequency drift
• Secondary oscillator using Timer1 @ 32 kHz
• Fail-Safe Clock Monitor:
- Allows for safe shutdown of device if clock fails
Program Memory
Device
Data Memory
I/O
Flash # Single-Word SRAM EEPROM
(bytes) Instructions (bytes) (bytes)
8192
16384
8192
16384
4096
8192
4096
8192
768
768
768
768
256
256
256
256
Timers
8/16-bit
1/3
1/3
1/3
1/3
PIC18F2331
PIC18F2431
PIC18F4331
PIC18F4431
24
24
36
36
Y
Y
Y
Y
2003 Microchip Technology Inc.
Preliminary
DS39616B-page 1
PIC18F2331/2431/4331/4431
Pin Diagrams
28-Pin SDIP, SOIC
MCLR/V
PP
/RE3
RA0/AN0
RA1/AN1
RA2/AN2/V
REF
-/CAP1/INDX
RA3/AN3/V
REF
+/CAP2/QEA
RA4/AN4/CAP3/QEB
AV
DD
AV
SS
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2/FLTA
RC2/CCP1/FLTB
RC3/T0CKI/T5CKI/INT0
•1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RB7/KBI3/PGD
RB6/KBI2/PGC
RB5/KBI1/PWM4/PGM
(1)
RB4/KBI0/PWM5
RB3/PWM3
RB2/PWM2
RB1/PWM1
RB0/PWM0
V
DD
V
SS
RC7/RX/DT/SDO
RC6/TX/CK/SS
RC5/INT2/SCK/SCL
RC4/INT1/SDI/SDA
Note 1:
Low-voltage programming must be enabled.
40-Pin PDIP
MCLR/V
PP
/RE3
RA0/AN0
RA1/AN1
RA2/AN2/V
REF
-/CAP1/INDX
RA3/AN3/V
REF
+/CAP2/QEA
RA4/AN4/CAP3/QEB
RA5/AN5/LVDIN
RE0/AN6
RE1/AN7
RE2/AN8
AV
DD
AV
SS
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2/FLTA
RC2/CCP1/FLTB
RC3/T0CKI
(1)
/T5CKI
(1)
/INT0
RD0/T0CKI/T5CKI
RD1/SDO
Note 1:
2:
3:
4:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
RB7/KBI3/PGD
RB6/KBI2/PGC
RB5/KBI1/PWM4/PGM
(2)
RB4/KBI0/PWM5
RB3/PWM3
RB2/PWM2
RB1/PWM1
RB0/PWM0
V
DD
V
SS
RD7/PWM7
RD6/PWM6
RD5/PWM4
(4)
RD4/FLTA
(3)
RC7/RX/DT/SDO
(1)
RC6/TX/CK/SS
RC5/INT2/SCK
(1)
/SCL
(1)
RC4/INT1/SDI
(1)
/SDA
(1)
RD3/SCK/SCL
RD2/SDI/SDA
PIC18F2331/2431
RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin
for SCK/SCL.
Low-voltage programming must be enabled.
RD4 is the alternate pin for FLTA.
RD5 is the alternate pin for PWM4.
DS39616B-page 2
Preliminary
PIC18F4331/4431
2003 Microchip Technology Inc.
PIC18F2331/2431/4331/4431
Pin Diagrams (Continued)
44-Pin TQFP
Note 1:
2:
3:
4:
RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin
for SCK/SCL.
Low-voltage programming must be enabled.
RD4 is the alternate pin for FLTA.
RD5 is the alternate pin for PWM4.
2003 Microchip Technology Inc.
NC
NC
RB4/KBI0/PWM5
RB5/KBI1/PWM4/PGM
(2)
RB6/KBI2/PGC
RB7/KBI3/PGD
MCLR/V
PP
/RE3
RA0/AN0
RA1/AN1
RA2/AN2/V
REF
-/CAP1/INDX
RA3/AN3/V
REF
+/CAP2/QEA
12
13
14
15
16
17
18
19
20
21
22
RC7/RX/DT/SDO
(1)
RD4/FLTA
(3)
RD5/PWM4
(4)
RD6/PWM6
RD7/PWM7
V
SS
V
DD
RB0/PWM0
RB1/PWM1
RB2/PWM2
RB3/PWM3
44
43
42
41
40
39
38
37
36
35
34
RC6/TX/CK/SS
RC5/INT2/SCK
(1)
/SCL
(1)
RC4/INT1/SDI
(1)
/SDA
(1)
RD3/SCK/SCL
RD2/SDI/SDA
RD1/SDO
RD0/T0CKI/T5CKI
RC3/T0CKI
(1)
/T5CKI
(1)
/INT0
RC2/CCP1/FLTB
RC1/T1OSI/CCP2/FLTA
NC
1
2
3
4
5
6
7
8
9
10
11
PIC18F4331
PIC18F4431
33
32
31
30
29
28
27
26
25
24
23
NC
RC0/T1OSO/T1CKI
OSC2/CLKO/RA6
OSC1/CLKI/RA7
AV
SS
AV
DD
RE2/AN8
RE1/AN7
RE0/AN6
RA5/AN5/LVDIN
RA4/AN4/CAP3/QEB
Preliminary
DS39616B-page 3
