ES25P80-75IC2Y datasheet(11/35 Pages) EXCELSEMI

Part #	ES25P80-75IC2Y

Description	8Mbit CMOS 3.0 Volt Flash Memory with 75Mhz SPI Bus Interface

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Manufacturer	EXCELSEMI [Excel Semiconductor Inc.]

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11 / 35 page

ES I

11

Rev. 0D May, 11, 2006

ES25P80

Excel Semiconductor inc.

ADVANCED INFORMATION

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Write Enable (WREN)

The Write Enable (WREN) instruction (Figure 4) sets

the Write Enable Latch (WEL) bit. The Write Enable

Latch (WEL) bit must be set prior to every Page Pro-

gram (PP or PPP), Erase (SE, BE or PE) and Write

Status Register (WRSR) instruction. The Write

Enable (WREN) instruction is entered by driving

Chip Select (CS#) Low, sending the instruction code,

and then driving Chip Select (CS#) High.

Write Disable (WRDI)

The Write Disable (WRDI) instruction (Figure 5)

resets the Write Enable Latch (WEL) bit. The Write

Disable (WRDI) instruction is entered by driving Chip

Select (CS#) Low, sending the instruction code, and

then driving Chip Select (CS#) High.

The Write Enable (WEL) bit is reset under the follow-

ing conditions :

- Power-up

- WRDI instruction completion

- WRSR instruction completion

- PP instruction completion

- SE instruction completion

- BE instruction completion

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Figure 4. Write Enable ( WREN ) Instruction Sequence

SCK

CS#

SI

SO

Instruction

High Impedance

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Figure 5. Write Disable ( WRDI ) Instruction Sequence

SCK

CS#

SI

SO

Instruction

High Impedance

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ES25P80-75IC2Y Datasheet(PDF) 11 Page - Excel Semiconductor Inc.

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