GD25Q80 Datasheet, PDF (29/49 Pages) ELM Electronics – 3.3V Uniform Sector Dual and Quad Serial Flash

GD25Q80CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
http://www.elm-tech.com
7.21. Release from Deep Power-Down or High Performance Mode and Read Device ID (RDI) (ABH)
The Release from Power-Down or High Performance Mode/Device ID command is a multi-purpose command.
It can be used to release the device from the Power-Down state or High Performance Mode or obtain the devices
electronic identification (ID) number.
To release the device from the Power-Down state or High Performance Mode, the command is issued by driving
the CS# pin low, shifting the instruction code “ABH” and driving CS# high as shown in Figure25. Release from
Power-Down will take the time duration of tRES1 (See AC Characteristics) before the device will resume normal
operation and other command 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 command is initiated by
driving the CS# pin low and shifting the instruction code “ABH” followed by 3-dummy byte. The Device ID
bits are then shifted out on the falling edge of SCLK with most significant bit (MSB) first as shown in Figure26.
The Device ID value is listed in Manufacturer and Device Identification table. The Device ID can be read
continuously. The command is completed by driving CS# high.
When used to release the device from the Power-Down state and obtain the Device ID, the command is the
same as previously described, and shown in Figure26, 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 command will be accepted. If the Release from Power-Down/Device ID command is issued
while an Erase, Program or Write cycle is in process (when WIP equal 1) the command is ignored and will not
have any effects on the current cycle.
Figure 25. Release Power-Down Sequence or High Performance Mode Sequence Diagram
CS#
SCLK
01234567
t_RES1
Command
SI
ABH
Deep Power-down mode
Stand-by mode
Figure 26. Release Power-Down and Read Device ID Sequence Diagram
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