24CS512TESLASHST datasheet(26/66 Pages) MICROCHIP

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24CS512

DS20005769C-page 26

 2018-2021 Microchip Technology Inc.

Software Write Protection Memory Zone bits

(SWP<7:0>): These bits divide the memory array into

eight separate 64-Kbit (8192-byte) zones. Each zone

can be set independently from the seven other protec-

tion zones. The corresponding SWP bit should be set

to a logic ‘1’ to write-protect that zone. All of the eight

SWP bits are set to logic ‘0’ as a factory default. For

additional information on the Software Write Protection

scheme, refer to Section 6.6.2 “Enhanced Software

Write Protection Mode”.

CONFIGURATION REGISTER – BYTE 1

R/W

SWP7

SWP6

SWP5

SWP4

SWP3

SWP2

SWP1

SWP0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

If EWPM = 1:

bit 7

SWP7: Software Write Protection Memory Zone 7 bit

1 = Memory Zone 7 (E000h-FFFFh) is write-protected

0 = Memory Zone 7 (E000h-FFFFh) is not write-protected

bit 6

SWP6: Software Write Protection Memory Zone 6 bit

1 = Memory Zone 6 (C000h-DFFFh) is write-protected

0 = Memory Zone 6 (C000h-DFFFh) is not write-protected

bit 5

SWP5: Software Write Protection Memory Zone 5 bit

1 = Memory Zone 5 (A000h-BFFFh) is write-protected

0 = Memory Zone 5 (A000h-BFFFh) is not write-protected

bit 4

SWP4: Software Write Protection Memory Zone 4 bit

1 = Memory Zone 4 (8000h-9FFFh) is write-protected

0 = Memory Zone 4 (8000h-9FFFh) is not write-protected

bit 3

SWP3: Software Write Protection Memory Zone 3 bit

1 = Memory Zone 3 (6000h-7FFFh) is write-protected

0 = Memory Zone 3 (6000h-7FFFh) is not write-protected

bit 2

SWP2: Software Write Protection Memory Zone 2 bit

1 = Memory Zone 2 (4000h-5FFFh) is write-protected

0 = Memory Zone 2 (4000h-5FFFh) is not write-protected

bit 1

SWP1: Software Write Protection Memory Zone 1 bit

1 = Memory Zone 1 (2000h-3FFFh) is write-protected

0 = Memory Zone 1 (2000h-3FFFh) is not write-protected

bit 0

SWP0: Software Write Protection Memory Zone 0 bit

1 = Memory Zone 0 (0000h-1FFFh) is write-protected

0 = Memory Zone 0 (0000h-1FFFh) is not write-protected

If EWPM = 0:

bit 7-0

Unused

Note:

In Legacy Hardware Write Protection

mode (EWPM = 0), the SWP<7:0> bits

are ignored. However, a dummy value

must still be sent during the write

sequence to initiate the internal write

operation.

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