S25FL004K Meet Spansion Inc., S25FL004K Datasheet - Page 40

• Manufacturer Part Number: S25FL004K
• Description: 4-mbit / 8-mbit / 16-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

7.16
40
Continuous Read Mode Reset (FFh or FFFFh)
Continuous Read Mode Reset instruction can be used to set M4 = 1, thus the device will release the
Continuous Read Mode and return to normal SPI operation, as shown in
Since S25FL004K/S25FL008K/S25FL016K does not have a hardware Reset pin, so if the controller resets
while S25FL004K/S25FL008K/S25FL016K is set to Continuous Mode Read, the S25FL004K/S25FL008K/
S25FL016K will not recognize any initial standard SPI instructions from the controller. To address this
possibility, it is recommended to issue a Continuous Read Mode Reset instruction as the first instruction after
a system Reset. Doing so will release the device from the Continuous Read Mode and allow Standard SPI
instructions to be recognized.
To reset “Continuous Read Mode” during Quad I/O operation, only eight clocks are needed. The instruction is
“FFh”. To reset “Continuous Read Mode” during Dual I/O operation, sixteen clocks are needed to shift in
instruction “FFFFh”.
CS#
CLK
IO3
IO1
IO2
IO0
Mode 3
Mode 0
Figure 7.19 Continuous Read Mode Reset for Fast Read Dual/Quad I/O
0
S25FL004K / S25FL008K / S25FL016K
1
Mode Bit Reset
for Quad I/O
2
FFh
3
4
D a t a
5
6
Don’t Care
Don’t Care
Don’t Care
7
S h e e t
8
9
10
11
Mode Bit Reset
for Quad I/O
FFh
S25FL004K-016K_00_02 July 14, 2011
Figure
12
13
7.19.
14
15
Mode 3
Mode 0