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GD25Q256D 数据表(PDF) 47 Page - GigaDevice Semiconductor (Beijing) Inc.

部件名 GD25Q256D
功能描述  3.3V Uniform Sector Dual and Quad Serial Flash
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制造商  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
网页  http://www.gigadevice.com/
标志 GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25Q256D 数据表(HTML) 47 Page - GigaDevice Semiconductor (Beijing) Inc.

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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25Q256D
47
7.19. 64KB Block Erase (BE64 D8H or 4BE64 DCH)
The 64KB Block Erase (BE) command is erased 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 64KB 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 64KB Block Erase (BE) command. CS# must be driven low for the entire duration of the sequence.
The 64KB Block Erase command sequence: CS# goes low  sending 64KB Block Erase command  3-Byte address
on SI  CS# goes high. CS# must be driven high after the eighth bit of the last address Byte has been latched in; otherwise
the 64KB Block Erase (BE) command is not executed. As soon as CS# is driven high, the self-timed Block Erase cycle
(whose duration is tBE) is initiated. While the Block 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 Block 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 64KB Block Erase (BE) command applied to a block which is protected by the Block Protect (TB, BP3, BP2, BP1, and
BP0) bits is not executed.
Figure 49. 64KB Block Erase Sequence Diagram (ADS=0)
Figure 50.64KB Block Erase Sequence Diagram (ADS=1)
Figure 51. 64KB Block Erase with 4-Byte Address Sequence Diagram (ADS=0 or ADS=1)
Command
0
1
2
3
4
5
6
7
D8H
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
D8H
CS#
SCLK
SI
8
9
37 38 39
MSB
2
1
0
32 Bits Address
31 30
Command
0
1
2
3
4
5
6
7
DCH
CS#
SCLK
SI
8
9
37 38 39
MSB
2
1
0
32 Bits Address
31 30


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