PIC16C717/770/771
PIC16C717/770/771 Rev. C Silicon/Data Sheet Errata
The PIC16C717/770/771 parts you have received con-
form functionally to the Device Data Sheet
(DS41120B), except for the anomalies described
below.
All problems listed here will be addressed in future revi-
sions of the PIC16C717/770/771 silicon.
1.
Module: A/D Converter
Exception to Table 15-12, Parameter A04.
PIC16C770/771 (12-bit A/D): No missing codes to
11-bits of resolution, up to 4 non-consecutive
missing codes may occur when used to 12-bits of
resolution.
Work around
None.
2.
Module: Timer1
When Timer1 is configured to operate as an asyn-
chronous counter, care must be taken that there is
no incoming pulse while the module is being
turned off. If an incoming pulse arrives while
Timer1 is being turned off (i.e., TMR1ON transi-
tions from 1 to 0), the value of registers TMR1L
and TMR1H will be unpredictable.
Work around
This solution involves changing Timer1 from Asyn-
chronous to Synchronous mode before turning off
Timer1. No additional resources are required for
this solution.
Timer1 synchronization will start, effectively stop-
ping Timer1, one Q period after the Synchronous
mode is enabled, or one Q period later than would
have been realized by simply clearing the
TMR1ON bit. One additional count, in excess of
the counts accrued during this extra Q period, may
be accumulated before the TMR1ON bit is eventu-
ally cleared in the next instruction. The occurrence
of this additional count is dependent on the phase
relationship between OSC1, or the internal system
clock, and T1CKI.
CODE EXAMPLE :
**************************************************************************************
;
Call this routine to stop Timer1 asynchronous counting
;
;
Timer1 is stopped after the timer is changed to synchronous mode
;
The captured timer value resides in TMR1H and TMR1L at the completion of this
;
routine.
TMR1Capture
bcf
T1CON,NOT_T1SYNC
bcf
T1CON,TMR1ON
bsf
T1CON,NOT_T1SYNC
return
;
;
;
;
;
entry point
set for synchronous mode
stop timer
restore asynchronous mode
return to calling routine
©
2002 Microchip Technology Inc.
DS80100C-page 1
PIC16C717/770/771
3.
Module: ECCP (Compare Mode)
The CCP1 output latch, observed on RB3/CCP1/
P1A, can change unexpectedly when the ECCP
module is changed from a set output on match
(CCP1CON<3:0> = “1000”) to clear output on
match (CCP1CON<3:0> = “1001”) or vice versa.
This condition will occur, following an ECCP
Reset, at the third iteration of the following
sequence:
1.
2.
CCPR1<3:0> is changed from “1001” to
“1000” or vice versa.
The TMR1H:TMR1L register pair matches
the CCP1R1H:CCPR1L register pair.
The apparent inverted response will persist until
the CCP1CON<3> bit is cleared (exiting Compare
mode). Interrupts always occur correctly on the
match condition. The error is only in the state of the
CCP1 output latch.
Work around
Option 1
Use the ECCP toggle output on compare match
mode (CCP1CON<3:0> = “0010”).
Option 2
Do not selectively change the CCP1CON<0> bit.
Instead, perform the following:
• Set the RB3 data latch to the same state as
the CCP1 output latch (movf PORTB, f) to
avoid an output glitch when the CCP1CON
register is cleared.
• Next, clear the CCP1CON register (clrf
CCP1CON).
• Finally, set the CCP1CON<3:0> bits to the
next desired output on Compare Match
mode.
Step 1 of the third iteration will cause the CCP1
output latch to immediately, and erroneously,
change to the inverse of the CCPR1<0> bit. This
gives the appearance of an inverted ECCP
response to the third, and subsequent, compare
match events.
TABLE 1: DC SPECIFICATION DEVIATIONS FROM DATA SHEET
Param
No.
D005
Tested Specification
Min
V
BOR
BOR Voltage
BORV<1:0> = 0100
BORV<1:0> = 0101
BORV<1:0> = 0110
BORV<1:0> = 0111
2.35
2.55
3.95
4.23
Typ
—
—
—
—
Max
2.80
3.02
4.71
5.05
Data Sheet
Specification
Min
2.5
2.7
4.2
4.5
Typ
—
—
—
—
Max
2.66
2.86
4.46
4.78
V
V
V
V
Sym.
Characteristic
Units
TABLE 2: DC SPECIFICATION DEVIATIONS FROM DATA SHEET
Param
No.
D420
Tested Specification
Min
V
LVD
LVD Voltage
LVV<3:0> = 0100
LVV<3:0> = 0101
LVV<3:0> = 0110
LVV<3:0> = 0111
LVV<3:0> = 1000
LVV<3:0> = 1001
LVV<3:0> = 1010
LVV<3:0> = 1011
LVV<3:0> = 1100
LVV<3:0> = 1101
LVV<3:0> = 1110
2.35
2.55
2.64
2.83
3.11
3.29
3.39
3.58
3.77
3.95
4.23
Typ
—
—
—
—
—
—
—
—
—
—
—
Max
2.80
3.02
3.14
3.37
3.71
3.93
4.04
4.26
4.49
4.71
5.05
Data Sheet
Specification
Min
2.5
2.7
2.8
3.0
3.3
3.5
3.6
3.8
4.0
4.2
4.5
Typ
—
—
—
—
—
—
—
—
—
—
—
Max
2.66
2.86
2.98
3.2
3.52
3.72
3.84
4.04
4.26
4.46
4.78
V
V
V
V
V
V
V
V
V
V
V
Sym.
Characteristic
Units
DS80100C-page 2
©
2002 Microchip Technology Inc.
PIC16C717/770/771
Clarifications/Corrections to the Data Sheet:
In the Device Data Sheet (DS41120B), the following
clarifications and corrections should be noted.
1.
Module:
DC Characteristics
Figure 15-1: TPIC16C717/770/771 VOLTAGE-
FREQUENCY GRAPH, -40°C
≤
T
A
≤
+85°C;
Figure title changes from +85°C to
+125°C.
2.
Module:
DC Characteristics
Figure 15-3:
PIC16LC717/770/771 VOLTAGE-
FREQUENCY GRAPH, -40°C
≤
T
A
≤
0°C,
+70°C
≤
T
A
≤
+85°C
;
Figure title changes from +85°C to
+125°C.
©
2002 Microchip Technology Inc.
DS80100C-page 3
PIC16C717/770/771
REVISION HISTORY
Rev A Document (2/01)
Original errata document.
Issues 1 (A/D Converter) and 2 (Timer1 Module)
were added (page 1).
Item 1, Table 5-12 concerning Parameter A04, was
added (page 2).
Rev B Document (9/01)
Issue 3 (ECCP Compare Mode), Table 1 and 2
were added (page 2).
Under the Clarifications/Corrections Section, Item
1, Table 15-12 was updated with additional infor-
mation (page 3).
Under the Clarifications/Corrections Section, the
following Items were added:
Item 2, Table 15-15 concerning DC Characteristics
for PIC16C717 and PIC16LC717 was updated
(page 4).
Item 3, Section 15.1 and Section 15.2 concerning
DC Characteristics for PIC16C717/770/771 and
PIC16LC717/770/771, respectively were replaced
with a new Section, which contains updated infor-
mation in a new format (page 5).
Item 4, Table 15-11 concerning DC Characteristics
for V
REF
was replaced with updated information
(page 8).
Rev C Document (8/02)
Under the Data Sheet Clarifications/Corrections
Section, Items 1 through 4 were incorporated into
DS41120B. New Items 1 and 2 were added for
clarification.
DS80100C-page 4
©
2002 Microchip Technology Inc.
Note the following details of the code protection feature on PICmicro
®
MCUs.
•
•
•
The PICmicro family meets the specifications contained in the Microchip Data Sheet.
Microchip believes that its family of PICmicro microcontrollers is one of the most secure products 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 knowl-
edge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet.
The person doing so may be engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable”.
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of
our product.
•
•
•
If you have any further questions about this matter, please contact the local sales office nearest to you.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
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rights.
Trademarks
The Microchip name and logo, the Microchip logo, K
EE
L
OQ
,
MPLAB, PIC, PICmicro, PICSTART and PRO MATE are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
FilterLab, microID, MXDEV, MXLAB, PICMASTER, SEEVAL
and The Embedded Control Solutions Company are
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in the U.S.A.
dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense,
FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,
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MPLINK, MPSIM, PICC, PICDEM, PICDEM.net, rfPIC, Select
Mode and Total Endurance are trademarks of Microchip
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Serialized Quick Turn Programming (SQTP) is a service mark
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All other trademarks mentioned herein are property of their
respective companies.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
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certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro
®
8-bit MCUs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
©
2002 Microchip Technology Inc.
DS80100C - page 5
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