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GD25B64C Datasheet(Arkusz danych) 17 Page - GigaDevice Semiconductor (Beijing) Inc.

Numer części GD25B64C
Szczegółowy opis  3.3V Uniform Sector Dual and Quad Serial Flash
Pobierz  57 Pages
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Producent  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Strona internetowa  http://www.gigadevice.com/
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 17 page
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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25B64C
17
7.3.
Write Enable for Volatile Status Register (50H)
The non-volatile Status Register bits can also be written to as volatile bits. This gives more flexibility to change the
system configuration and memory protection schemes quickly without waiting for the typical non-volatile bit write cycles or
affecting the endurance of the Status Register non-volatile bits. The Write Enable for Volatile Status Register command
must be issued prior to a Write Status Register command and any other commands cannot be inserted between them.
Otherwise, Write Enable for Volatile Status Register will be cleared. The Write Enable for Volatile Status Register
command will not set the Write Enable Latch bit, it is only valid for the Write Status Register command to change the
volatile Status Register bit values.
Figure 3. Write Enable for Volatile Status Register Sequence Diagram
7.4. Read Status Register (RDSR) (05H or 35H or 15H)
The Read Status Register (RDSR) command is for reading the Status Register. The Status Register may be read at
any time, even while a Program, Erase or Write Status Register cycle is in progress. When one of these cycles is in
progress, it is recommended to check the Write in Progress (WIP) bit before sending a new command to the device. It is
also possible to read the Status Register continuously.
For command code “05H” / “35H” / “15H”, the SO will output Status
Register bits S7~S0 / S15-S8 / S23-S16.
Figure 4. Read Status Register Sequence Diagram
Command
0
1
2
3
4
5
6
7
05H or 35H or 15H
CS#
SCLK
SI
SO
High-Z
8
9 10 11 12 13 14 15
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
MSB
Register0/1/2
MSB
Register0/1/2
CS#
SCLK
Command(50H)
SI
SO
0
1
2
3
4
5
6
7
High-Z




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