PIC16F83
PIC16F83 Rev. A Silicon Errata Sheet
The PIC16F83 (Rev. A) parts you have received conform
functionally to the Device Data Sheet (DS30430
C
),
except for the anomalies described below.
All the problems listed here will be addressed in future
revisions of the PIC16F83 silicon.
1.
Module: CPU (STATUS bit)
The operation of the power-down (PD) bit in the STA-
TUS register may not function correctly for tempera-
tures below - 20 ˚C.
Work Around
None
2.
Module: Data EEPROM
Do not perform a modify (set or clear a bit) of the
EECON1 register one instruction cycle after an
EEPROM read. This will corrupt the EEDATA regis-
ter.
Example:
BSF
BCF
EECON1, RD
EECON1, WREN
3.
Module: Timer0
The TMR0 register may increment when the WDT
postscaler is switched to the Timer0 prescaler. If
TMR0 = FFh, this will cause TMR0 to overflow (set-
ting T0IF).
Work Around
Follow the following sequence:
a)
b)
c)
d)
Read the 8-bit TMR0 register into the W register
Clear the TMR0 register
Assign WDT postscaler to Timer0
Write W register to TMR0
Work Around
Use either of the following two code segment in place
of the above example.
BSF
NOP
BCF
EECON1, RD
EECON1, WREN
or
BCF
BSF
EECON1, WREN
EECON1, RD
Note:
As with any windowed EPROM device, please cover the window at all times, except when erasing.
©
1998 Microchip Technology Inc.
DS30430C/F83/E1A1-page 1
PIC16F83
Clarifications/Corrections to the Data Sheet:
In the Device Data Sheet (DS30430
C
), the following clar-
ifications and corrections should be noted.
1.
Module: Data EEPROM
In the PIC16F8X Data Sheet (DS30430
B
), the following
clarifications and corrections should be noted.
a)
Erase/Write Cycle Time for Data EEPROM should
be changed from 10 ms maximum to 20 ms maxi-
mum, as shown in Table 1.
TABLE 1: DC SPECIFICATION LIMITS THAT VARY FROM DATA SHEET
Parameter
No.
Actual Data
Sym.
Characteristic
Typ
Max
Typ
Max
Data Sheet
Units
D122
T
DEW
Erase Write Cycle Time
10
20 *
—
10
ms
* This parameter is characterized but not tested
2.
a)
Module: Device Idd
The maximum device I
DD
in the LP oscillaor mode
(at 32KHz, 2.0 V, and WDT disabled) should be
changed from 32
µ
A maximum to 45
µ
A maximum,
as shown in Table 1.
TABLE 2: DC SPECIFICATION LIMITS THAT VARY FROM DATA SHEET
Parameter
No.
Actual Data
Sym.
Characteristic
Typ
Max
Typ
Max
Data Sheet
Units
D014
I
DD
Supply Current
15
45
15
32
µ
A
DS30430C/F83/E1A1-page 2
©
1998 Microchip Technology Inc.
PIC16F83
©
1998 Microchip Technology Inc.
DS30430C/F83/E1A1-page 3
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®
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All rights reserved. © 1998 Microchip Technology Incorporated. Printed in the USA. 10/98
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DS30430C/F83/E1A1-page 4
©
1998 Microchip Technology Inc.
