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GD25LB32D Scheda tecnica(PDF) 31 Page - GigaDevice Semiconductor (Beijing) Inc.

Il numero della parte GD25LB32D
Spiegazioni elettronici  1.8V Uniform Sector Dual and Quad Serial Flash
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Produttore elettronici  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Homepage  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25LB32D Scheda tecnica(HTML) 31 Page - GigaDevice Semiconductor (Beijing) Inc.

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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LB32D
31
Figure15a. Page Program Sequence Diagram (QPI)
CS#
SCLK
IO0
IO1
IO2
IO3
0
1
2
3
4
5
Command
02H
20
12
16
8
6
7
8
9
10
4
4
0
0
4
0
4
0
21
13
17
9
5
5
1
1
5
1
5
1
22
14
18
10
6
6
2
2
6
2
6
2
23
15
19
11
7
7
3
3
7
3
7
3
A23-16 A15-8
A7-0
11
12 13
Byte1
Byte2
4
0
4
0
5
1
5
1
6
2
6
2
7
3
7
3
Byte3
Byte255 Byte256
7.16.
Quad Page Program (32H)
The Quad Page Program command is for programming the memory using four pins: IO0, IO1, IO2, and IO3. A Write
Enable (WREN) command must previously have been executed to set the Write Enable Latch (WEL) bit before sending the
Page Program command. The quad Page Program command is entered by driving CS# Low, followed by the command
code (32H), three address bytes and at least one data byte on IO pins.
The command sequence is shown in Figure16. If more than 256 bytes are sent to the device, previously latched data
are discarded and the last 256 data bytes are guaranteed to be programmed correctly within the same page. If less than
256 data bytes are sent to device, they are correctly programmed at the requested addresses without having any effects on
the other bytes of the same page. CS# must be driven high after the eighth bit of the last data byte has been latched in;
otherwise the Quad Page Program (PP) command is not executed.
As soon as CS# is driven high, the self-timed Quad Page Program cycle (whose duration is tPP) is initiated. While the
Quad Page Program 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 Quad Page Program 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 Quad Page Program command applied to a page which is protected by the Block Protect (BP4, BP3, BP2, BP1,
and BP0) is not executed.


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