MX35LF1GE4AB-Macronix

MX35LF1GE4AB
MX35LF2GE4AB
8-1. WRITE Operations
8-1-1. Write Enable
The Write Enable (WREN, 06h) instruction is for setting Write Enable Latch (WEL) bit. For those instructions
like Page Program, Secure OTP program, Block Erase, which are intended to change the device content
WEL bit should be set every time after the WREN instruction setting the WEL bit.
The sequence of issuing WREN instruction is: CS# goes low→sending WREN instruction code→ CS# goes
high.
Figure 5. Write Enable (WREN) Sequence
CS#
SCLK
Mode 3
0
1 2 3 4 5 6 7
Mode 0
Command
SI
06h
SO
High-Z
8-1-2. Write Disable (04h)
The Write Disable (WRDI, 04h) instruction is to reset Write Enable Latch (WEL) bit.
The sequence of issuing WRDI instruction is: CS# goes low→sending WRDI instruction code→CS# goes
high. It disables the following operations:
• Block Erase
• Secure OTP program
• Page program
Figure 6. Write Disable (WRDI) Sequence
CS#
SCLK
Mode 3
0
1 2 3 4 5 6 7
Mode 0
Command
SI
04h
SO
High-Z
P/N: PM2128 REV. 1.5, June 07, 2017
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