M25P40 Serial Flash Embedded Memory
READ STATUS REGISTER
READ STATUS REGISTER
The READ STATUS REGISTER command allows the status register to be read. The status
register may be read at any time, even while a PROGRAM, ERASE, or WRITE STATUS
REGISTER cycle is in progress. When one of these cycles is in progress, it is recommen-
ded to check the write in progress (WIP) bit before sending a new command to the de-
vice. It is also possible to read the status register continuously.
Figure 10: READ STATUS REGISTER Command Sequence
0
7
8
9
10
11
12
13
14
15
C
DQ0
DQ1
LSB
Command
High-Z
MSB
LSB
DOUT
MSB
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
Don’t Care
Figure 11: Status Register Format
b7
b0
WIP
BP2
BP1
BP0
WEL
0
0
SRWD
status register write protect
block protect bits
write enable latch bit
write in progress bit
PDF: 09005aef8456654f
m25p40.pdf - Rev. G 05/13 EN
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