MX25L1635D
DEVICE OPERATION
1. Before a command is issued, status register should be checked to ensure device is ready for the intended operation.
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, all SO pins of this LSI should be High-Z.
3. When correct command is inputted to this LSI, this LSI becomes active mode and keeps the active mode until next
CS# rising edge.
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 mode 0 and mode 3 is shown as Figure 2.
5. For the following instructions: RDID, RDSR, RDSCUR, READ, FAST_READ, 2READ, 4READ,RES, REMS, REMS2
and REMS4 the shifted-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, 4PP, CP, RDP, DP,
ENSO, EXSO,and WRSCUR, the CS# must go high exactly at the byte boundary; otherwise, the instruction will be
rejected and not executed.
6. DuringtheprogressofWriteStatusRegister,Program,Eraseoperation,toaccessthememoryarrayisneglectedand
not affect the current operation of Write Status Register, Program, Erase.
Figure 1. Serial Modes Supported
CPOL CPHA
shift in
shift out
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:PM1374
REV. 1.5, OCT. 01, 2008
13
Macronix [ MACRONIX INTERNATIONAL ]
