Information

© 2009 Microchip Technology Inc. DS80238C-page 3
PIC16F91X/946
Silicon Errata Issues
1. Module: LCD
The LCD module may generate incorrect
waveforms when using type-B waveforms (WFT =
1) with one-third multiplex (LMUX<1:0> = 10).
Work around
Avoid the use of type-B waveforms with one-third
multiplex. When one-third is required, use type-A
waveforms.
Affected Silicon Revisions
PIC16F913/914
PIC16F916/917
PIC16F946
2. Module: LP/Timer1 Oscillator Operation
Below 25°C
1-2% of devices experience reduced drive as
temperatures approach -40°C. This will result in a
loss of Timer1 counts or stopped Timer1
oscillation.
This can also prevent Timer1 oscillator start-up
under cold conditions.
Work around
Use of low-power crystals properly matched to the
device will reduce the likelihood of failure. A 1MΩ
resister between OSC2 and VDD will further
improve the drive strength of the circuit.
Affected Silicon Revisions
PIC16F913/914
PIC16F916/917
PIC16F946
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 (as applicable).
A0 A1 A2
A3
XXX
X
A0 A1 A2 B0 B1 B2
B3
XXXXXX
X
A0 A1
A2
XX
X
A0 A1 A2 A3
XXX
X
A0 A1 A2 B0 B1 B2
B3
XXXXXX
X
A0 A1
A2
XX
X