W25Q64DWZPIP datasheet(49/82 Pages) WINBOND

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W25Q64DW

Publication Release Date: September 18, 2012

- 49 -

Revision D

10.2.26 Erase / Program Suspend (75h)

The Erase/Program Suspend instruction “75h”, allows the system to interrupt a Sector or Block Erase

operation or a Page Program operation and then read from or program/erase data to, any other sectors or

blocks. The Erase/Program Suspend instruction sequence is shown in Figure 25a & 25b.

The Write Status Register instruction (01h) and Erase instructions (20h, 52h, D8h, C7h, 60h, 44h) are not

allowed during Erase Suspend. Erase Suspend is valid only during the Sector or Block erase operation. If

written during the Chip Erase operation, the Erase Suspend instruction is ignored. The Write Status

Suspend. Program Suspend is valid only during the Page Program or Quad Page Program operation.

The Erase/Program Suspend instruction “75h” will be accepted by the device only if the SUS bit in the

Status Register equals to 0 and the BUSY bit equals to 1 while a Sector or Block Erase or a Page

Program operation is on-going. If the SUS bit equals to 1 or the BUSY bit equals to 0, the Suspend

instruction will be ignored by the device. A maximum of time of “tSUS” (See AC Characteristics) is required

to suspend the erase or program operation. The BUSY bit in the Status Register will be cleared from 1 to

0 within “tSUS” and the SUS bit in the Status Register will be set from 0 to 1 immediately after

Erase/Program Suspend. For a previously resumed Erase/Program operation, it is also required that the

Suspend instruction “75h” is not issued earlier than a minimum of time of “tSUS” following the preceding

Resume instruction “7Ah”.

Unexpected power off during the Erase/Program suspend state will reset the device and release the

suspend state. SUS bit in the Status Register will also reset to 0. The data within the page, sector or block

that was being suspended may become corrupted. It is recommended for the user to implement system

design techniques against the accidental power interruption and preserve data integrity during

erase/program suspend state.

/CS

CLK

(IO

Mode 0

Mode 3

Instruction (75h)

High Impedance

Mode 0

Mode 3

tSUS

Accept instructions

Figure 25a. Erase/Program Suspend Instruction (SPI Mode)

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