n25q064 Numonyx, n25q064 Datasheet - Page 65

• Manufacturer Part Number: n25q064
• Description: 64mb 1.8v, Multiple I/o, 4kb Subsector Erase, Xip Enabled, Serial Flash Memory With 108 Mhz Spi Bus Interface
• Manufacturer: Numonyx

N25Q064 - 1.8V
9.1.10
9.1.11
Write Enable (WREN)
The Write Enable (WREN) instruction sets the Write Enable Latch (WEL) bit. The Write
Enable Latch (WEL) bit must be set prior to every Program, Erase, or Write instructions:
Page Program (PP), Dual Input Fast Program (DIFP), Dual Input Extended Fast Program
(DIEFP), Quad Input Fast Program (QIFP), Quad Input Extended Fast Program (QIEFP),
Program OTP (POTP), Write to Lock Register (WRLR), Subsector Erase (SSE), Sector
Erase (SE), Bulk Erase (BE), Write Status Register (WRSR), Write Configuration Register
(WRCR), Write Enhanced Configuration Register (WRECR) and Write NV Configuration
Register (WRNVCR) instruction.
The Write Enable (WREN) instruction is entered by driving Chip Select (S) Low, sending the
instruction code, and then driving Chip Select (S) High.
At the end of the POR sequence the WEL bit is low, so the next modify instruction can be
accepted.
Figure 19. Write Enable instruction sequence
Write Disable (WRDI)
The Write Disable (WRDI) instruction resets the Write Enable Latch (WEL) bit. The Write
Disable (WRDI) instruction is entered by driving Chip Select (S) Low, sending the instruction
code, and then driving Chip Select (S) High.
S
C
DQ0
DQ1
High Impedance
0
1
2
Instruction
3
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AI13731
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