M95080-DRDW3TP datasheet(18/42 Pages) STMICROELECTRONICS

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Instructions

M95080-A125 M95080-A145

18/42

DocID024205 Rev 8

4.4

Write Status Register (WRSR)

The Write Status Register (WRSR) instruction allows new values to be written to the Status

have been executed.

The Write Status Register (WRSR) instruction is entered (MSB first) by driving Chip Select

(S) low, sending the instruction code followed by the data byte on Serial Data input (D), and

driving the Chip Select (S) signal high.

The contents of the SRWD and BP1, BP0 bits are updated after the completion of the

WRSR instruction, including the Write cycle (tW).

The Write Status Register (WRSR) instruction has no effect on the b6, b5, b4, b1 and b0 bits

in the Status Register (see Table 2: Status Register format).

The Status Register functionality is detailed in Section 3.4.2: Status Register and data

protection.

The instruction is not accepted, and is not executed, if a Write cycle is currently in progress.

Figure 8. Write Status Register (WRSR) sequence

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