W25Q16DW
QE bit will remain to be 1. A “Write Status Register” command in QPI mode cannot change QE bit from a
“1” to a “0”.
WARNING: If the /WP or /HOLD pins are tied directly to the power supply or ground during
standard SPI or Dual SPI operation, the QE bit should never be set to a 1.
S7
S6
S5
S4
S3
S2
S1
S0
SRP0
SEC
TB
BP2
BP1
BP0
WEL BUSY
STATUS REGISTER PROTECT 0
(non-volatile)
SECTOR PROTECT
(non-volatile)
TOP/BOTTOM PROTECT
(non-volatile)
BLOCK PROTECT BITS
(non-volatile)
WRITE ENABLE LATCH
ERASE/WRITE IN PROGRESS
Figure 4a. Status Register-1
S15
SUS
S14
CMP
S13
LB3
S12
LB2
S11
LB1
S10
LB0
S9
QE
S8
SRP1
SUSPEND STATUS
COMPLEMENT PROTECT
(non-volatile)
SECURITY REGISTER LOCK BITS
(non-volatile OTP)
QUAD ENABLE
(non-volatile)
STATUS REGISTER PROTECT 1
(non-volatile)
Figure 4b. Status Register-2
- 16 -
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