f25l32qa Elite Semiconductor Memory Technology Inc., f25l32qa Datasheet - Page 24

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f25l32qa

Manufacturer Part Number
f25l32qa
Description
3v Only 32 Mbit Serial Flash Memory With Dual And Quad
Manufacturer
Elite Semiconductor Memory Technology Inc.
Datasheet

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Mode Bit Reset
Mode bits [M
overhead for Fast Read Dual/Quad I/O operation. If [M
“AxH”, the next Fast Read Dual/Quad I/O instruction doesn’t
need the command code.
If the system controller is reset during operation, it will send a
standard instruction (such as Read ID) to the Flash memory.
Elite Semiconductor Memory Technology Inc.
Figure 16: Mode Bit Reset Instruction
7
SIO
SCK
SIO
–M
CE
SIO
SIO
Note: To reset mode bits dur ing Quad I/O operation, only eight cl ocks are needed. The command code is “FFH”.
0
1
2
3
0
] are issued to further reduce instruction
MODE3
MODE0
To reset mode bits durin g Dua l I/O operation, sixteen clocks are needed to shift in command code “FFFFH”.
0
Mode bit Reset for Quad I/O
1
2
3
FF
4
(Preliminary)
5
Mode bit Reset for Dual I/O
7
6
–M
0
7
] =
8
9
However, the device doesn’t have a hardware reset pin, so if
[M
instruction. After a system reset, it is recommended to issue a
Mode Bit Reset instruction first to release the status of [M
“AxH” and allow the device to recognize standard SPI instruction.
See Figure 16 for the Mode Bit Reset instruction.
7
10
–M
0
11
] = “AxH”, the device will not recognize any standard SPI
FF
12
13
14
15
Publication Date: Jan. 2009
Revision: 0.2
F25L32QA
24/42
7
–M
0
] =

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