6.8

Write identification page

The identification page (256 bytes) is an additional page that can be written and (later) permanently locked in

read-only mode.

Writing this page is achieved with the write identification page instruction (see Table 4. Instruction set). The chip

select signal (S) is first driven low. The bits of the instruction byte, address bytes, and at least one data byte are

then shifted in on serial data input (D). Address bit A10 must be 0, the upper address bits are "don't care", and

the lower address bits [A7:A0] define the byte address within the identification page. The instruction sequence is

shown in Figure 17.

Figure 17. Write identification page sequence

MS30909V1

C

D

S

Q

23

2

1

3

4

5

6

7

8

9 10

28 29 30 31 32 33 34 35

22 21

3

2

1

0

36 37 38

High impedance

Instruction

24-bit address

0

7

6

5

4

3

2

0

1

Data byte

39

M95M02-DR M95M02-DF

Write identification page

DS7024 - Rev 13

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