參數(shù)資料
型號(hào)： W25Q16DWSNIP
廠(chǎng)商： WINBOND ELECTRONICS CORP
元件分類(lèi)： PROM
英文描述： 16M X 1 SPI BUS SERIAL EEPROM, PDSO8
封裝： 0.150 INCH, GREEN, PLASTIC, SOIC-8
文件頁(yè)數(shù)： 7/83頁(yè)
文件大小： 1268K
代理商： W25Q16DWSNIP
W25Q16DW
Publication Release Date: April 01, 2011
- 15 -
Preliminary - Revision A
10.1.10 Quad Enable (QE)
The Quad Enable (QE) bit is a non-volatile read/write bit in the status register (S9) that allows Quad SPI
and QPI operation. When the QE bit is set to a 0 state (factory default), the /WP pin and /HOLD are
enabled. When the QE bit is set to a 1, the Quad IO2 and IO3 pins are enabled, and /WP and /HOLD
functions are disabled.
QE bit is required to be set to a 1 before issuing an “Enable QPI (38h)” to switch the device from
Standard/Dual/Quad SPI to QPI, otherwise the command will be ignored. When the device is in QPI mode,
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
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
S14
S13
S12
S11
S10
S9
S8
SUS
CMP
LB3
LB2
LB1
LB0
QE
SRP1
SUSPEND STATUS
COMPLEMENT PROTECT
(non-volatile)
SECURITY REGISTER LOCK BITS
(non-volatile OTP)
QUAD ENABLE
(non-volatile)
STATUS REGISTER PROTECT 1
(non-volatile)
S15
S14
S13
S12
S11
S10
S9
S8
SUS
CMP
LB3
LB2
LB1
LB0
QE
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
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