PIC16LF1902/1903 Silicon Errata and Data Sheet Clarification

PIC16LF1902/1903
PIC16LF1902/1903 Family
Silicon Errata and Data Sheet Clarification
The PIC16LF1902/1903 family devices that you have
received conform functionally to the current Device
Data Sheet (DS41455B), 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. The silicon issues are summarized in
Table 2.
2.
3.
The errata described in this document will be addressed
in future revisions of the PIC16LF1902/1903 silicon.
4.
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 (A5).
5.
Data Sheet clarifications and corrections start on page
5, following the discussion of silicon issues.
Note:
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).
TABLE 1:
Using the appropriate interface, connect the
device to the hardware debugger.
Open an MPLAB IDE project.
Configure the MPLAB IDE project for the
appropriate device and hardware debugger.
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 (
).
Depending on the development tool used, the
part number and Device Revision ID value
appear in the Output window.
If you are unable to extract the silicon
revision level, please contact your local
Microchip sales office for assistance.
The DEVREV values for the various PIC16LF1902/
1903 silicon revisions are shown in Table 1.
SILICON DEVREV VALUES
DEVICE ID<13:0>
Part Number
DEV<8:0>
(1)
REV<4:0> Silicon Revision(2)
A2
A4
A5
PIC16LF1902
01 1100 001
0 0010
0 0100
0 0101
PIC16LF1903
01 1100 000
0 0010
0 0100
0 0101
Note 1:
2:
The Device ID is located in the configuration memory at address 8006h.
Refer to the “PIC16(L)F193X/(L)F194X/LF190X Memory Programming Specification” (DS41397) for
detailed information on Device and Revision IDs for your specific device.
 2011-2013 Microchip Technology Inc.
DS80000523E-page 1
PIC16LF1902/1903
TABLE 2:
SILICON ISSUE SUMMARY
Module
Feature
Item
Number
Issue Summary
Affected
Revisions(1)
A2
A4
High-Frequency
Internal Oscillator
(HFINTOSC)
HFINTOSC Operation
1.1
HFINTOSC Max. VDD at -40°C
X
Oscillator
HFINTOSC Ready/Stable
bit
2.1
Bits remained set to ‘1’ after initial
trigger
X
Oscillator
Clock Switching
2.2
Clock switching fails
X
X
Sleep Module
Sleep
3.1
Wake from Sleep
X
X
Note 1:
A5
X
Only those issues indicated in the last column apply to the current silicon revision.
DS80000523E-page 2
 2011-2013 Microchip Technology Inc.
PIC16LF1902/1903
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 (A5).
1. Module: High-Frequency Internal
Oscillator (HFINTOSC)
1.1 HFINTOSC Max. VDD at -40°C
The High-Frequency Internal Oscillator may stop
working at -40°C when VDD is 3.6V.
Work around
1.
2.
Use the Internal Oscillator (INTOSC) with VDD =
3.5V or less.
Operate the device with VDD = 3.0V then, after
the High-Frequency Oscillator (HFINTOSC) is
operating at speed, increase VDD to 3.6V.
Affected Silicon Revisions
A2
A4
2.2 Clock Switching
When switching clock sources between an
INTOSC clock source and an external clock
source operating at a different power mode, one
corrupted instruction may be executed after the
switch occurs.
Work around
When clock switching from an external oscillator
clock source, first switch to 16 MHz HFINTOSC.
Once running at 16 MHz HFINTOSC, configure
IRCF to run at desired frequency.
When clock switching from an INTOSC to an
external oscillator clock source, first switch from
desired INTOSC frequency to HFINTOSC
High-Power mode (8 MHz or 16 MHz). Once
running from HFINTOSC, switch to the external
oscillator clock source.
Affected Silicon Revisions
A2
A4
X
X
A5
A5
X
2. Module: Oscillator
2.1 OSCSTAT bits: HFIOFR and HFIOFS
When HFINTOSC is selected, HFIOFR and
HFIOFS bits will become set when the oscillator
becomes ready and stable. Once these bits are set
they become “stuck”, indicating that HFINTOSC is
always ready and stable. If HFINTOSC is disabled,
the bits fail to be cleared.
Work around
None.
Affected Silicon Revisions
A2
A4
X
X
A5
 2011-2013 Microchip Technology Inc.
DS80000523E-page 3
PIC16LF1902/1903
3. Module: Sleep Module
3.1 Sleep
Under certain conditions, when the LCD is clocked
by LFINTOSC during Sleep mode, the device may
not wake-up from Sleep mode.
Work around
Instead of using Sleep mode, switch the oscillator
to LFINTOSC (OSCCON = 0x00) and use a delay
loop.
Affected Silicon Revisions
A2
A4
A5
X
X
X
DS80000523E-page 4
 2011-2013 Microchip Technology Inc.
PIC16LF1902/1903
Data Sheet Clarifications
The following typographic corrections and clarifications
are to be noted for the latest version of the device data
sheet (DS41455B):
Note:
Corrections are shown in bold. Where
possible, the original bold text formatting
has been removed for clarity.
1. Module: Device ID and Revision ID
Device ID correction for PIC16LF1902 and
PIC16LF1903 on page 41 of data sheet
DS41455B. In Register 4-3, DEV<8:0> bits
should read:
Device
DEVICEID<13:0> Values
DEV<8:0>
REV<4:0>
PIC16LF1902
01 1100 001
x xxxx
PIC16LF1903
01 1100 000
x xxxx
 2011-2013 Microchip Technology Inc.
DS80000523E-page 5
PIC16LF1902/1903
APPENDIX A:
DOCUMENT
REVISION HISTORY
Rev A Document (05/2011)
Initial release of this document.
Rev B Document (11/2011)
Added Silicon Revision A4.
Rev C Document (01/2012)
Added Modules 2.1, 2.2 and 2.3.
Rev D Document (01/2013)
Added MPLAB X IDE; Added Module 3.
Rev E Document (10/2013)
Added Silicon Revision A5; Other minor corrections.
DS80000523E-page 6
 2011-2013 Microchip Technology Inc.
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.
•
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Trademarks
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ISBN: 9781620776698
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