M25PE80 Numonyx, B.V., M25PE80 Datasheet - Page 22

• Manufacturer Part Number: M25PE80
• Description: 8-Mbit, page-erasable serial flash memory with byte alterability, 75 MHz SPI bus, standard pinout
• Manufacturer: Numonyx, B.V.

Instructions
6.2
22/66
Figure 7.
Write disable (WRDI)
The write disable (WRDI) instruction
The write disable (WRDI) instruction is entered by driving Chip Select (S) Low, sending the
instruction code, and then driving Chip Select (S) High.
The write enable latch (WEL) bit is reset under the following conditions:
Figure 8.
Power-up
Write disable (WRDI) instruction completion
Page write (PW) instruction completion
Page program (PP) instruction completion
Write to lock register (WRLR) instruction completion
Page erase (PE) instruction completion
Sector erase (SE) instruction completion
Bulk erase (BE) instruction completion.
Write enable (WREN) instruction sequence
Write disable (WRDI) instruction sequence
S
C
D
Q
S
C
D
Q
High Impedance
High Impedance
0
0
(Figure
1
1
2
2
Instruction
Instruction
8) resets the write enable latch (WEL) bit.
3
3
4
4
5
5
6
6
7
7
AI03750D
AI02281E
M25PE80