PIC17C43 datasheet(8/16 Pages) MICROCHIP

8 / 16 page

PIC17CXX

DS30139I-page 8

4.2

Embedding Conﬁguration Word Information in the Hex File

TABLE 4-3:

CONFIGURATION WORD

PIC17C42

To code protect:

• Protect all memory

XXXXXXXXX0X0XXXX

PIC17C42A

To code protect:

• Protect all memory

0XXXXXXXX0X0XXXX

PIC17CR42

To code protect:

• Protect all memory

0XXXXXXX0X0XXXX

PIC17C43

To code protect:

• Protect all memory

0XXXXXXX0X0XXXX

PIC17CR43

To code protect:

• Protect all memory

0XXXXXXX0X0XXXX

PIC17C44

To code protect:

• Protect all memory

0XXXXXXX0X0XXXX

Legend: X = Don’t care

*Write to on-chip EPROM memory is disabled. The only way these locations can be programmed is if a TABLWT

instruction is issued from an “on-chip” program memory space to program an on-chip memory location.

To allow portability of code, a PIC17C4X programmer is required to read the conﬁguration word locations from the hex

ﬁle when loading the hex ﬁle. If conﬁguration word information was not present in the hex ﬁle then a simple warning

message may be issued. Similarly, while saving a hex ﬁle, all conﬁguration word information must be included. An

option to not include the conﬁguration word information may be provided. When embedding conﬁguration word infor-

mation in the hex ﬁle, it should be to address FE00h.

Microchip Technology Inc. feels strongly that this feature is important for the beneﬁt of the end customer.

Program Memory Segment

R/W in Protected Mode

R/W in Unprotected Mode

Conﬁguration Word (0xFE00)

Read Scrambled, Write Enabled