Uniform Sector

Standard and Dual Serial Flash

GD25WD80C

18

7.9. Sector Erase (SE) (20H)

The Sector Erase (SE) command is for erasing the all data of the specific 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 Figure9. 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

Register is accessed 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 becomes 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 (BP2, BP1, BP0) bit (see Table1) is not executed.

Figure9. Sector Erase Sequence Diagram

7.10.

32KB Block Erase (BE) (52H)

The 32KB Block Erase (BE) command is for erasing the all data of the chosen block. A Write Enable (WREN)

command must previously have been executed to set the Write Enable Latch (WEL) bit. The 32KB Block Erase (BE)

command is entered by driving CS# low, followed by the command code, and three address bytes on SI. Any address inside

the block is a valid address for the 32KB Block Erase (BE) command. CS# must be driven low for the entire duration of the

sequence.

The 32KB Block Erase command sequence: CS# goes low  sending 32KB Block Erase command  3-byte address

on SI  CS# goes high. The command sequence is shown in Figure10. CS# must be driven high after the eighth bit of the

last address byte has been latched in; otherwise the 32KB Block Erase (BE) command is not executed. As soon as CS# is

the Status Register is accessed to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1

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

completed, the Write Enable Latch (WEL) bit is reset. A 32KB Block Erase (BE) command applied to a block which is

protected by the Block Protect (BP2, BP1, BP0) bits (see Table1) is not executed.

Figure10. 32KB Block Erase Sequence Diagram

Command

0

1

2

3

4

5

6

7

20H

CS#

SCLK

SI

8

9

29 30 31

MSB

2

1

0

24 Bits Address

23 22

Command

0

1

2

3

4

5

6

7

52H

CS#

SCLK

SI

8

9

29 30 31

MSB

2

1

0

24 Bits Address

23 22