PIC17C756
Errata Sheet of Rev. A PIC17C756 Silicon
The PIC17C756 (Rev. A) parts you have received con-
form functionally to the PIC17C75X preliminary data
sheet (DS30264A), except for the following clarifica-
tions and corrections.
FIGURE 1:
Error
A/D NON-LINEARITY
1. Module: MSSP
In I
2
C™ mode, the SSPBUF may receive either all
0’s or all 1’s independent of the data on the SDA
pin
Work around
Both the SMP and CKE bits need to be in the same
state (set or cleared) for proper operation. There is
no possible mode conflict since the CKE bit is not
defined for I
2
C operation.
+1
Codes
-1
A
NALOG
I
NPUT
V
OLTAGE
2. Module: TCON3 Register
Bit 7 of the TCON3 register, which is unimple-
mented, may read a value other then the defined
state of ‘0’.
Work around
Since bit 7 is unimplemented, either ignore this bit,
or read the TCON3 register into a temporary loca-
tion and AND it with the value 7Fh.
Work around
Under either of the following conditions, the device
will retain the
±
1 LSb maximum error specifica-
tions:
1.
2.
V
REF
+
≤
AV
DD
- 0.3V
Device Temperature
≤
25˚C
3. Module: 10-Bit A/D
The least significant Analog-to-Digital (A/D) result
codes may be lost when the device operates at a
temperature > 25˚C and the V
REF
+
>
AV
DD
- 0.3V.
Figure 1 shows the non-linearity issue.
4. Module: 10-Bit A/D
The presence of code 511 is not guaranteed for
the 10-bit A/D conversion result.
The 10-bit digital result gives 1024 codes (0 to
1023). The 10-bit A/D result is as expected for
codes 0 to 510 and codes 512 to 1023. The analog
value expected as code 511 may be represented
as either code 510, code 511, or code 512. Code
511 is the midpoint of the analog voltage range.
Note:
As with any windowed EPROM device, please cover the window at all times, except when erasing.
I
2
C is a trademark of Philips Corporation.
©
August, 1997 Microchip Technology Inc.
DS30264A/756/E1A2-page 1
PIC17C756
Clarifications/Corrections to the Data Sheet:
In the PIC17C75X Preliminary Data Sheet (document
DS30264A) that you have received, requires the follow-
ing clarifications and corrections.
NONE
DS30264A/756/E1A2-page 2
©
August, 1997 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
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
K
EE
L
OQ
, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode
and Total Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
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.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999. 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 and microperipheral
products. In addition, Microchip’s quality
system for the design and manufacture of
development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
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