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 2011-2012 Microchip Technology Inc. DS80521B-page 1

PIC16(L)F720/721

The PIC16(L)F720/721 family devices that you have

received conform functionally to the current Device Data

Sheet (DS41341E), except for the anomalies described

in this document.

The silicon issues discussed in the following pages are

for silicon revisions with the Device and Revision IDs

listed in Table 1. The silicon issues are summarized in

Table 2.

The errata described in this document will be addressed

in future revisions of the PIC16(L)F720/721 silicon.

Data Sheet clarifications and corrections start on page 4,

following the discussion of silicon issues.

The silicon revision level can be identified using the

current version of MPLAB

IDE and Microchip’s

programmers, debuggers, and emulation tools, which

are available at the Microchip corporate web site

(www.microchip.com).

For example, to identify the silicon revision level

using MPLAB IDE in conjunction with a hardware

debugger:

1. Using the appropriate interface, connect the

device to the hardware debugger.

2. Open an MPLAB IDE project.

3. Configure the MPLAB IDE project for the

appropriate device and hardware debugger.

4. Based on the version of MPLAB IDE you are

using, do one of the following:

a) For MPLAB IDE 8, select Programmer >

Reconnect.

b) For MPLAB X IDE, select Window >

Dashboard and click the Refresh Debug

Tool Status icon ( ).

5. Depending on the development tool used, the

part number and Device Revision ID value

appear in the Output window.

The DEVREV values for the various PIC16(L)F720/721

silicon revisions are shown in Tabl e 1.

Note: This document summarizes all silicon

errata issues from all revisions of silicon,

previous as well as current. Only the

issues indicated in the last column of

Table 2 apply to the current silicon

revision (A4).

Note: If you are unable to extract the silicon

revision level, please contact your local

Microchip sales office for assistance.

TABLE 1: SILICON DEVREV VALUES

Part Number Device ID

(1)

Revision ID for Silicon Revision

(2)

A3 A4

PIC16F720 01 1100 000x xxxx 0 0011 0 0100

PIC16LF720 01 1100 010x xxxx 0 0011 0 0100

PIC16F721 01 1100 001x xxxx 0 0011 0 0100

PIC16LF721 01 1100 011x xxxx 0 0011 0 0100

Note 1: The Device ID is located at address location 2006h. The five Least Significant bits (LSb) comprise the

revision ID.

2: Refer to the “PIC16F720/721 Memory Programming Specification” (DS41409) for detailed information on

Device and Revision IDs for your specific device.

PIC16(L)F720/721 Family

Silicon Errata and Data Sheet Clarification

Summary of content (8 pages)

PAGE 1
PIC16(L)F720/721 PIC16(L)F720/721 Family Silicon Errata and Data Sheet Clarification The PIC16(L)F720/721 family devices that you have received conform functionally to the current Device Data Sheet (DS41341E), except for the anomalies described in this document. For example, to identify the silicon revision level using MPLAB IDE in conjunction with a hardware debugger: 1. The silicon issues discussed in the following pages are for silicon revisions with the Device and Revision IDs listed in Table 1.
PAGE 2
PIC16(L)F720/721 TABLE 2: SILICON ISSUE SUMMARY Feature Item Number AUSART OERR Flag 1.1 AUSART Interrupts 1.2 Interrupts Stack Push 2.1 Module DS80521B-page 2 Issue Summary Affected Revisions(1) A3 A4 OERR flag not clearing. X X Starting the Interrupt Service Routine (ISR). X X Interrupt logic incorrectly pushes two addresses to the stack. X X  2011-2012 Microchip Technology Inc.
PAGE 3
PIC16(L)F720/721 Silicon Errata Issues Note: This document summarizes all silicon errata issues from all revisions of silicon, previous as well as current. Only the issues indicated by the shaded column in the following tables apply to the current silicon revision (A4). 1. Module: AUSART 1.1 OERR Flag Not Clearing The OERR flag of the RCSTA register is reset only by either clearing the CREN bit of the RCSTA register or by a device Reset.
PAGE 4
PIC16(L)F720/721 Data Sheet Clarifications The following typographic corrections and clarifications are to be noted for the latest version of the device data sheet (DS41341E): Note: Corrections are shown in bold. Where possible, the original bold text formatting has been removed for clarity. None. DS80521B-page 4  2011-2012 Microchip Technology Inc.
PAGE 5
PIC16(L)F720/721 APPENDIX A: DOCUMENT REVISION HISTORY Rev. A Document (02/2011) Original release of this document. Rev. B Document (12/2012) Added MPLAB X IDE; Added Silicon Revision A4; Added Issue Title 2.1 Stack Push; Updated Table 1 and Table 2.  2011-2012 Microchip Technology Inc.
PAGE 6
PIC16(L)F720/721 NOTES: DS80521B-page 6  2011-2012 Microchip Technology Inc.
PAGE 7
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 8
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