GD25Q32C datasheet(29/50 Pages) ELM

29 / 50 page

Rev.1.0

50 -

http://www.elm-tech.com

GD25Q32CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash

Figure 23. 64KB Block Erase Sequence Diagram

Command

0 1 2 3 4 5 6 7

D8H

CS#

SCLK

8 9

29 30 31

MSB

2 1 0

24 Bits Address

23 22

7.20. Chip Erase (CE) (60/C7H)

The Chip Erase (CE) command is used to erase all the data of the chip. A Write Enable (WREN) command

must previously have been executed to set the Write Enable Latch (WEL) bit. The Chip Erase (CE) command is

entered by driving CS# Low, followed by the command code on Serial Data Input (SI). CS# must be driven Low

for the entire duration of the sequence.

The Chip Erase command sequence: CS# goes low → sending Chip Erase command → CS# goes high. The

command sequence is shown in Figure24. CS# must be driven high after the eighth bit of the command code

has been latched in; otherwise the Chip Erase command is not executed. As soon as CS# is driven high, the self-

timed Chip Erase cycle (whose duration is tCE) is initiated. While the Chip Erase cycle is in progress, the Status

during the self-timed Chip Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle

is completed, the Write Enable Latch (WEL) bit is reset. The Chip Erase (CE) command is executed only if all

Block Protect (BP2, BP1 and BP0) bits are 0. The Chip Erase (CE) command is ignored if one or more sectors

are protected.

Figure 24. Chip Erase Sequence Diagram

Command

0 1 2 3 4 5 6 7

60H or C7H

CS#

SCLK

7.21. 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. This releases the device from this mode. The Release from Deep Power-Down and Read

Device ID (RDI) command 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 Power-Up in the

Standby Mode. The Deep Power-Down (DP) command is entered by driving CS# low, followed by the command

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