GD25LE40CSIG datasheet(34/75 Pages) GIGADEVICE

34 / 75 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE40C/20C/10C/05C

7.19 Enable/Disable SO to Output RY/BY# (ESRY/DSRY) (70H/80H)

Besides SO pin is used to output data, it also can be used as the status pin of ready/busy. The ESRY command is for

outputting the ready/busy status to SO. When the device is in the process of power on, enter or exit deep power down

mode and erase/program, its status is busy, and the SO output 0. When the device is in the standby mode, the status of

device is ready, then SO output 1. The DSRY command is for resetting ESRY. The ready/busy status will not output to SO

after DSRY issued.

The Enable/Disable SO to Output RY/BY# command sequence:

CS# goes low → sending ESRY command code → CS#

goes high. The command sequence is shown in Figure20. CS# must be driven high after the eighth bit of the command

code has been latched in; otherwise the Enable/Disable SO to Output RY/BY# command is not executed.

Figure20. Enable/Disable SO to Output RY/BY# Diagram

7.20 Deep Power-Down (DP) (B9H)

Executing the Deep Power-Down (DP) command is the only way to put the device in the lowest consumption mode (the

Deep Power-Down Mode). It can also be used as an extra software protection mechanism, while the device is not in active

use, since in this mode, the device ignores all Write, Program and Erase commands. Driving CS# high deselects the device,

and puts the device in the Standby Mode (if there is no internal cycle currently in progress). But this mode is not the Deep

Power-Down Mode. The Deep Power-Down Mode can only be entered by executing the Deep Power-Down (DP) command.

Once the device has entered the Deep Power-Down Mode, all commands are ignored except the Release from Deep

Power-Down and Read Device ID (RDI) command or software reset command. The Release from Deep Power-Down and

Read Device ID (RDI) command releases the device from Deep Power-Down mode, also allows the Device ID of the device

to be output on SO.

The Deep Power-Down Mode automatically stops at Power-Down, and the device always in the Standby Mode after Power-

Up.

The Deep Power-Down command sequence: CS# goes low  sending Deep Power-Down command  CS# goes high.

The command sequence is shown in Figure21. CS# must be driven high after the eighth bit of the command code has been

latched in; otherwise the Deep Power-Down (DP) command is not executed. As soon as CS# is driven high, it requires a

delay of tDP before the supply current is reduced to ICC2 and the Deep Power-Down Mode is entered. Any Deep Power-

Down (DP) command, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the

cycle that is in progress.

Command

0 1 2 3 4 5 6 7

70H or 80H

CS#

SCLK

GD25LE40CSIG Scheda tecnica(PDF) 34 Page - GigaDevice Semiconductor (Beijing) Inc.