25X10ALAIZ Ver la hoja de datos (PDF) - Winbond

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25X10ALAIZ

1M-BIT, 2M-BIT, 4M-BIT AND 8M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI

Winbond 

W25X10AL, W25X20AL, W25X40AL, W25X80AL

10.2.11 Sector Erase (20h)

The Sector Erase instruction sets all memory within a specified sector (4K-bytes) to the erased state

of all 1s (FFh). A Write Enable instruction must be executed before the device will accept the Sector

Erase Instruction (Status Register bit WEL must equal 1). The instruction is initiated by driving the /CS

pin low and shifting the instruction code “20h” followed a 24-bit sector address (A23-A0) (see Figure

2). The Sector Erase instruction sequence is shown in figure 12.

The /CS pin must be driven high after the eighth bit of the last byte has been latched. If this is not

done the Sector Erase instruction will not be executed. After /CS is driven high, the self-timed Sector

Erase instruction will commence for a time duration of tSE (See AC Characteristics). While the Sector

Erase cycle is in progress, the Read Status Register instruction may still be accessed for checking the

status of the BUSY bit. The BUSY bit is a 1 during the Sector Erase cycle and becomes a 0 when the

cycle is finished and the device is ready to accept other instructions again. After the Sector Erase

cycle has finished the Write Enable Latch (WEL) bit in the Status Register is cleared to 0. The Sector

Erase instruction will not be executed if the addressed page is protected by the Block Protect (TB,

BP2, BP1, and BP0) bits (see Status Register Memory Protection table).

Figure 12. Sector Erase Instruction Sequence Diagram

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Publication Release Date: May 9, 2008

Revision B

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