PIC16F193X Datasheet, PDF (131/418 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

10.2 Code Protection
Code protection is controlled using the CP bit in
Configuration Word 1. When code protection is
enabled, all program memory locations (0000h-7FFFh)
read as all ‘0’. Further programming is disabled for the
program memory (0000h-7FFFh).
Data memory is protected with its own Code-Protect bit
(CPD). When data code protection is enabled (CPD = 0),
all data memory locations read as ‘0’. Further
programming is disabled for the data memory. Data
memory can still be programmed and read during
program execution.
The user ID locations and Configuration Words can be
programmed and read out regardless of the code
protection settings.
10.3 User ID
Four memory locations (8000h-8003h) are designated
as ID locations where the user can store checksum or
other code identification numbers. These locations are
not accessible during normal execution, but are read-
able and writable during Program/Verify mode. Only
the Least Significant 7 bits of the ID locations are
reported when using MPLAB^® IDE. See the
“PIC16193X/PIC16LF193X Memory Programming
Specification” (DS41360A) for more information.
PIC16F193X/LF193X
© 2008 Microchip Technology Inc.
Preliminary
DS41364A-page 129