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PIC18F2331/2431/4331/4431

In the Device Data Sheet (DS39616B), the following

clarifications and corrections should be noted. Any sili-

con issues related to the PIC18F2331/2431/4331/4431

will be reported in a separate silicon errata. Please

check the Microchip Web site for any existing issues.

Clarifications/Corrections to the

Data Sheet:

In the Device Data Sheet (DS39616B), the following

clarifications and corrections should be noted.

1. Module: Power-on Reset

The following note has been added to Section 4.1

“Power-on Reset (POR)”:

2. Module: Watchdog Timer

In Table 22-2: Summary of Watchdog Timer

Registers, the WINEN bit (CONFIG2H<5>) should

not be shaded.

3. Module: PWM Equations

In Section 17.5 “PWM Period”, Equations 17-1,

17-2 and 17-3 should be corrected as shown.

EQUATION 17-1: PWM PERIOD FOR FREE

RUNNING MODE

EQUATION 17-2: PWM PERIOD FOR

UP/DOWN COUNTING

MODE

EQUATION 17-3: PWM RESOLUTION

Note: The following decoupling method is

recommended:

1. A 1 μF capacitor should be connected

across A

VDD and AVSS.

2. A similar capacitor should be

connected across V

DD and VSS.

TPWM =

(PTPER + 1) x PTMRPS

OSC/4

TPWM =

(2 x PTPER) x PTMRPS

OSC

Resolution =

log(2)

log

OSC

Fpwm

PIC18F2331/2431/4331/4431 Data Sheet Errata

Summary of content (16 pages)

PAGE 1
PIC18F2331/2431/4331/4431 PIC18F2331/2431/4331/4431 Data Sheet Errata In the Device Data Sheet (DS39616B), the following clarifications and corrections should be noted. Any silicon issues related to the PIC18F2331/2431/4331/4431 will be reported in a separate silicon errata. Please check the Microchip Web site for any existing issues. 3. Module: PWM Equations In Section 17.5 “PWM Period”, Equations 17-1, 17-2 and 17-3 should be corrected as shown.
PAGE 2
PIC18F2331/2431/4331/4431 4. Module: DC Characteristics Specifications and parameter numbers have been revised for specific temperature ranges for date codes from 0421xxx and higher. The specifications and parameter numbers for the Brown-out Reset Voltage limits (VBOR, originally parameter D005) in Section 25.1 “DC Characteristics: Supply Voltage” of the Device Data Sheet have been changed. The new information is shown in bold text.
PAGE 3
PIC18F2331/2431/4331/4431 25.
PAGE 4
PIC18F2331/2431/4331/4431 5. Module: LVD Characteristics Specifications and parameter numbers have been revised for specific temperature ranges for date codes from 0421xxx and higher. The specifications and parameter numbers for the Low-Voltage Detect thresholds (VLVD, originally parameter D420) in Table 25-2 of the Device Data Sheet have been changed. The new information is shown in bold text.
PAGE 5
PIC18F2331/2431/4331/4431 TABLE 25-2: LOW-VOLTAGE DETECT CHARACTERISTICS (CONTINUED) PIC18LF2331/2431/4331/4431 (Industrial) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial PIC18F2331/2431/4331/4431 (Industrial, Extended) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial -40°C ≤ TA ≤ +125°C for extended Param No.
PAGE 6
PIC18F2331/2431/4331/4431 TABLE 25-2: LOW-VOLTAGE DETECT CHARACTERISTICS (CONTINUED) PIC18LF2331/2431/4331/4431 (Industrial) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial PIC18F2331/2431/4331/4431 (Industrial, Extended) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial -40°C ≤ TA ≤ +125°C for extended Param No.
PAGE 7
PIC18F2331/2431/4331/4431 6. Module: 28-Pin QFN Diagram A 28-pin QFN package has been introduced for the PIC18F2331 and PIC18F2431 devices. The Device Data Sheet has been updated as follows: • The Pin Diagram section (page 3) has been updated to include the new 28-pin QFN package.
PAGE 8
PIC18F2331/2431/4331/4431 • A new column with pin number information for the 28-pin QFN package has been added to Table 1-2 (pages 12-14). New information is shown in bold text. TABLE 1-2: PIC18F2331/2431 PINOUT I/O DESCRIPTIONS Pin Number Pin Name DIP, QFN SOIC MCLR/VPP/RE3 MCLR 1 26 VPP RE3 OSC1/CLKI/RA7 OSC1 9 Pin Buffer Type Type I ST P I ST 6 I CLKI I RA7 I/O OSC2/CLKO/RA6 OSC2 10 Description Master Clear (input) or programming voltage (input). Master Clear (Reset) input.
PAGE 9
PIC18F2331/2431/4331/4431 TABLE 1-2: PIC18F2331/2431 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Number Pin Name Pin Buffer Type Type DIP, QFN SOIC Description PORTB is a bidirectional I/O port. PORTB can be software programmed for internal weak pull-ups on all inputs.
PAGE 10
PIC18F2331/2431/4331/4431 TABLE 1-2: PIC18F2331/2431 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Number Pin Name Pin Buffer Type Type DIP, QFN SOIC Description PORTC is a bidirectional I/O port.
PAGE 11
PIC18F2331/2431/4331/4431 • 28-pin QFN details have been added to Section 27.1 “Package Marking Information” (page 373). 27.1 Package Marking Information 28-Lead QFN Example XXXXXXXX XXXXXXXX YYWWNNN Legend: XX...
PAGE 12
PIC18F2331/2431/4331/4431 • 28-pin QFN packaging details have been added to Section 27.2 “Package Details” (page 374). 28-Lead Plastic Quad Flat No Lead Package (MM) 6x6x0.9 mm Body (QFN-S) – With 0.
PAGE 13
PIC18F2331/2431/4331/4431 REVISION HISTORY Rev A Document (06/2005) First revision of this document. Data Sheet Clarification issues 1 (Power-on Reset), 2 (Watchdog Timer), 3 (PWM Equations), 4 (DC Characteristics), 5 (LVD Characteristics), and 6 (28-Pin QFN Diagram). © 2005 Microchip Technology Inc.
PAGE 15
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.
PAGE 16
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