IS25LP064A-RHLA1 datasheet(53/99 Pages) ISSI

53 / 99 page

IS25LP064A/032A

Integrated Silicon Solution, Inc.- www.issi.com

Rev. A

11/06/2015

8.21 PROGRAM/ERASE SUSPEND & RESUME

The device allows the interruption of Sector-Erase, Block-Erase or Page-Program operations to conduct other

operations. 75h/B0h command for suspend and 7Ah/30h for resume will be used. (SPI/QPI all acceptable)

Function Register bit2 (PSUS) and bit3 (ESUS) are used to check whether or not the device is in suspend mode.

Suspend to read ready timing: 100µs

Resume to another suspend timing: 400µs

PROGRAM/ERASE SUSPEND DURING SECTOR-ERASE OR BLOCK-Erase (PERSUS 75h/B0h)

The Program/Erase Suspend allows the interruption of Sector Erase and Block Erase operations. After the

Program/Erase Suspend, WEL bit will be disabled, therefore only read related, resume and reset commands

can be accepted. Refer to Table 8.3 for more detail.

To execute a Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend

command cycle (75h/B0h), then drives CE# high. The Function Register indicates that the erase has been

suspended by changing the ESUS bit from

“0” to “1”, but the device will not accept another command until it is

ready. To determine when the device will accept a new command, poll the WIP bit in the Status Register or wait

the specified time tSUS. When ESUS bit is issued, the Write Enable Latch (WEL) bit will be reset.

PROGRAM/ERASE SUSPEND DURING PAGE PROGRAMMING (PERSUS 75h/B0h)

The Program/Erase Suspend allows the interruption of all array program operations. After the Program/Erase

Suspend command, WEL bit will be disabled, therefore only read related, resume and reset command can be

accepted. Refer to Table 8.3 for more detail.

To execute the Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend

command cycle (75h/B0h), then drives CE# high. The Function Register indicates that the programming has

been suspended by changing the PSUS bit from

“0” to “1”, but the device will not accept another command until

it is ready. To determine when the device will accept a new command, poll the WIP bit in the Status Register or

wait the specified time tSUS.

PROGRAM/ERASE RESUME (PERRSM 7Ah/30h)

The Program/Erase Resume restarts the Program or Erase command that was suspended, and changes the

suspend status bit in the Function Register (ESUS or PSUS bits) back to

“0”. To execute the Program/Erase

Resume operation, the host drives CE# low, sends the Program/Erase Resume command cycle (7Ah/30h), then

drives CE# high. A cycle is two nibbles long, most significant nibble first. To determine if the internal, self-timed

Write operation completed, poll the WIP bit in the Status Register, or wait the specified time tSE, tBE or tPP for

Sector Erase, Block Erase, or Page Programming, respectively. The total write time before suspend and after

resume will not exceed the uninterrupted write times tSE, tBE or tPP.

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