GD25Q40C datasheet(26/64 Pages) GIGADEVICE

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3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q40C

Figure 19.Quad Page Program Sequence Diagram

7.16.

Sector Erase (SE) (20H)

The Sector Erase (SE) command is used to erase all the data of the chosen sector. A Write Enable (WREN) command

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

by driving CS# low, followed by the command code, and 3-address byte on SI. Any address inside the sector is a valid

address for the Sector Erase (SE) command. CS# must be driven low for the entire duration of the sequence.

The Sector Erase command sequence: CS# goes low  sending Sector Erase command  3-byte address on SI 

CS# goes high. The command sequence is shown in Figure21. CS# must be driven high after the eighth bit of the last

address byte has been latched in; otherwise the Sector Erase (SE) command is not executed. As soon as CS# is driven

high, the self-timed Sector Erase cycle (whose duration is tSE) is initiated. While the Sector Erase cycle is in progress, the

Status Register may be read to check the value of the Write in Progress (WIP) bit. The Write in Progress (WIP) bit is 1

during the self-timed Sector 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. A Sector Erase (SE) command applied to a sector which is protected

by the Block Protect (BP4, BP3, BP2, BP1, and BP0) bit (see Table1&1a) is not executed.

Command

32H

CS#

SCLK

9 10

28 29 30 31

23 22 21

24-bit address

32 33 34 35

MSB

36 37 38 39

SI(IO0)

SO(IO1)

WP#(IO2)

HOLD#(IO3)

Byte1 Byte2

CS#

SCLK

SI(IO0)

SO(IO1)

WP#(IO2)

HOLD#(IO3)

42 43 44 45

46 47

50 51 52 53

54 55

Byte11

Byte12

Byte253

Byte256

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