MX25L4006E
DEVICE OPERATION
1. Before a command is issued, status register should be checked to ensure device is ready for the intended op-
eration.
2. When incorrect command is inputted to this LSI, this LSI becomes standby mode and keeps the standby mode
until next CS# falling edge. In standby mode, SO pin of this LSI should be High-Z. The CS# falling time needs to
follow tCHCL spec.
3. When correct command is inputted to this LSI, this LSI becomes active mode and keeps the active mode until
next CS# rising edge. The CS# rising time needs to follow tCLCH spec.
4. Input data is latched on the rising edge of Serial Clock(SCLK) and data shifts out on the falling edge of SCLK.
The difference of serial peripheral interface mode 0 and mode 3 is shown as Figure 1.
5. For the following instructions: RDID, RDSR, READ, FAST_READ, RDSFDP, DREAD, RES and REMS the shift-
ed-in instruction sequence is followed by a data-out sequence. After any bit of data being shifted out, the CS#
can be high. For the following instructions: WREN, WRDI, WRSR, SE, BE, CE, PP, RDP and DP the CS# must
go high exactly at the byte boundary; otherwise, the instruction will be rejected and not executed.
6. During the progress of Write Status Register, Program, Erase operation, to access the memory array is neglect-
ed and not affect the current operation of Write Status Register, Program, Erase.
Figure 1. Serial Peripheral Interface Modes Supported
CPOL CPHA
shift out
shift in
SCLK
SCLK
(Serial mode 0)
(Serial mode 3)
0
1
0
1
SI
MSB
SO
MSB
Note:
CPOL indicates clock polarity of serial master, CPOL=1 for SCLK high while idle, CPOL=0 for SCLK low while not
transmitting. CPHA indicates clock phase. The combination of CPOL bit and CPHA bit decides which serial mode is
supported.
P/N: PM1576
REV. 1.3, FEB. 10, 2012
8
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