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GD25D20CTEG Datasheet(PDF) 19 Page - GigaDevice Semiconductor (Beijing) Inc.

No. de pieza GD25D20CTEG
Descripción Electrónicos  3.3V Uniform Sector Standard and Dual Serial Flash
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Fabricante Electrónico  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Página de inicio  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25D20CTEG Datasheet(HTML) 19 Page - GigaDevice Semiconductor (Beijing) Inc.

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3.3V Uniform Sector
Standard and Dual Serial Flash
GD25D40C/20C
19
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
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 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
7.11.
64KB Block Erase (BE) (D8H)
The 64KB 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 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. The command sequence is shown in Figure11. 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 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 64KB Block Erase (BE) command applied to a block which is
protected by the Block Protect (BP2, BP1, BP0) bits (see Table1) is not executed.
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


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