GD25B64CSIG datasheet(28/57 Pages) GIGADEVICE

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3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B64C

A Fast Page Program (FPP) command is not executed when it is applied to a page protected by the Block Protect

(BP4, BP3, BP2, BP1, BP0).

Figure 19. Fast Page Program Sequence Diagram

7.17.

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 below. 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.

Figure 20. Sector Erase Sequence Diagram

Command

20H

CS#

SCLK

29 30 31

MSB

24 Bits Address

23 22

Command

F2H

CS#

SCLK

9 10

28 29 30 31

23 22 21

24-bit address

42 43 44 45

46 47

50 51 52 53

54 55

CS#

SCLK

MSB

Data Byte 2

32 33 34 35

MSB

Data Byte 1

Data Byte 3

Data Byte 256

MSB

36 37 38 39

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