W25Q64FVSFIG 参数 Datasheet PDF下载

W25Q64FV

7.2.29

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 28a & 28b. Release from

power-down will take the time duration of t

RES1

(See AC Characteristics) before the device will resume

normal operation and other instructions are accepted. The /CS pin must remain high during the t

RES1

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 as shown in figure

28. The Device ID values for the W25Q64FV 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 28c & 28d, except that after /CS is driven high it

must remain high for a time duration of t

RES2

(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

tRES1

Mode 3

0

1

2

3

4

5

6

7

Mode 3

Mode 0

CLK

Mode 0

Instruction (ABh)

DI

(IO

0

)

Power-down current

Stand-by current

Figure 28a. Release Power-down Instruction (SPI Mode)

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Publication Release Date: December 19, 2011

Revision D