PIC12F629T-E/MD MICROCHIP [Microchip Technology], PIC12F629T-E/MD Datasheet - Page 52
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PIC12F629T-E/MD
Manufacturer Part Number
PIC12F629T-E/MD
Description
8-Pin, Flash-Based 8-Bit CMOS Microcontrollers
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC12F629T-EMD.pdf
(136 pages)
- Current page: 52 of 136
- Download datasheet (2Mb)
PIC12F629/675
8.7
Data memory can be code protected by programming
the CPD bit to ‘0’.
When the data memory is code protected, the CPU is
able to read and write data to the data EEPROM. It is
recommended to code protect the program memory
when code protecting data memory. This prevents
anyone from programming zeroes over the existing
code (which will execute as NOPs) to reach an added
routine, programmed in unused program memory,
which
Programming unused locations to ‘0’ will also help
prevent data memory code protection from becoming
breached.
TABLE 8-1:
DS41190G-page 52
0Ch
9Ah
9Bh
9Ch
9Dh
Legend: x = unknown, u = unchanged, - = unimplemented read as ‘
Note 1: EECON2 is not a physical register.
Address
outputs
Data EEPROM Operation During
Code Protect
Shaded cells are not used by data EEPROM module.
PIR1
EEDATA
EEADR
EECON1
EECON2
Name
the
REGISTERS/BITS ASSOCIATED WITH DATA EEPROM
(1)
contents
EEPROM Control Register 2
EEPROM Data Register
EEIF
Bit 7
—
—
EEPROM Address Register
ADIF
of
Bit 6
—
data
Bit 5
—
—
memory.
Bit 4
—
—
WRERR WREN
CMIF
Bit 3
0
’, q = value depends upon condition.
Bit 2
—
Bit 1
WR
—
TMR1IF 00-- 0--0 00-- 0--0
Bit 0
2010 Microchip Technology Inc.
RD
0000 0000 0000 0000
-000 0000 -000 0000
---- x000 ---- q000
---- ---- ---- ----
POR, BOD
Value on
Value on all
Resets
other
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