Information

 2002 Microchip Technology Inc. DS80102B-page 1
PIC16C54C/55A/56A/57C/58B
The PIC16C54C/55A/56A/57C/58B (Rev. A Silicon
ONLY) parts you have received conform functionally to
the PIC16C5X Device Data Sheet (DS30453D), except
for the anomalies described below.
All the problems listed here will be addressed in future
revisions of the PIC16C54C/55A/56A/57C/58B silicon.
1. Module: RESET
The minimum specification for the MCLR must be met
in order to RESET the PIC16C54C/55A/56A/57C/58B.
If a MCLR pulse occurs that is less than the minimum
specification (parameter #30), improper device opera-
tion can occur.
If the minimum specification cannot be met, then an
external circuit must be used to ensure that any pulse
width, less than the specification, will be filtered before
it reaches the MCLR
pin.
Work around
A possible circuit is shown in Figure 1. Proper design
validation needs to be done to ensure desired opera-
tion over the applications operating conditions.
FIGURE 1: MCLR EXTERNAL CIRCUIT
C1
R2
R1
V
DD
MCLR
PIC16C54C/
4.7KW < R1 < 10KW
0.0
µ
1F
≤
C1
≤
0.1
µ
F
R2 = 100
Ω
55A/56A/57C/
58B
Note: As with any windowed EPROM device, please cover the window at all times, except when erasing.
PIC16C54C/55A/56A/57C/58B (Rev. A Silicon) Errata Sheet