W25Q256JVEIQ-TR Datasheet, PDF (64/92 Pages) Winbond – 3V 256M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI

W25Q256JV
8.2.36 Release Power-down / Device ID (ABh)
The Release from Power-down / Device ID instruction is a multi-purpose instruction. It can be used to
release the device from the power-down state, or obtain the devices electronic identification (ID) number.
To release the device from the power-down state, the instruction is issued by driving the /CS pin low,
shifting the instruction code “ABh” and driving /CS high as shown in Figure 45. Release from power-down
will take the time duration of tRES1 (See AC Characteristics) before the device will resume normal
operation and other instructions are accepted. The /CS pin must remain high during the tRES1 time
duration.
When used only to obtain the Device ID while not in the power-down state, the instruction is initiated by
driving the /CS pin low and shifting the instruction code “ABh” followed by 3-dummy bytes. The Device ID
bits are then shifted out on the falling edge of CLK with most significant bit (MSB) first. The Device ID
values for the W25Q256JV is listed in Manufacturer and Device Identification table. The Device ID can be
read continuously. The instruction is completed by driving /CS high.
When used to release the device from the power-down state and obtain the Device ID, the instruction is
the same as previously described, and shown in Figure 45, except that after /CS is driven high it must
remain high for a time duration of tRES2 (See AC Characteristics). After this time duration the device will
resume normal operation and other instructions will be accepted. If the Release from Power-down /
Device ID instruction is issued while an Erase, Program or Write cycle is in process (when BUSY equals
1) the instruction is ignored and will not have any effects on the current cycle.
/CS
CLK
Mode 3
Mode 0
DI
(IO₀)
01234567
Instruction (ABh)
tRES1
Mode 3
Mode 0
Power-down current Stand-by current
Figure 45a. Release Power-down Instruction
/CS
CLK
DI
(IO₀)
DO
(IO₁)
Mode 3
0
Mode 0
* ^{= MSB}
123456789
29 30 31 32 33 34 35 36 37 38
Instruction (ABh)
3 Dummy Bytes
Mode 3
Mode 0
tRES2
23 22
*
High Impedance
210
Device ID
76543210
*
Power-down current
Stand-by current
Figure 45b. Release Power-down / Device ID Instruction
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