SA25F010LEM8 Ver la hoja de datos (PDF) - Saifun Semiconductors

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SA25F010LEM8

1Mb Serial Flash with 25MHz SPI Bus Interface

Saifun Semiconductors 

Write Enable (WREN)

The device powers up in the Write Disable

state when VCC is applied. All programming

instructions must be preceded by a WREN

instruction. The instruction sequence is

shown in Figure 11, with SO in high

impedance.

CS

SA25F010 Advanced Information

SAIFUN

20

Write Disable (WRDI)

To protect the device against inadvertent

writes, the WRDI instruction disables all

programming modes. The WRDI

instruction is independent of the WP pin's

status. The WREN instruction should be

executed after the WRDI instruction to

re-enable all programming modes. The

instruction sequence is shown in Figure 12,

with SO in high impedance.

SCK

01 234 567

Instruction

SI

Figure 11. Write Enable (WREN) Instruction Sequence

CS

SCK

01234567

Instruction

SI

Figure 12. Write Disable (WRDI) Instruction Sequence

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