LE25S161 datasheet(28/54 Pages) ONSEMI

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LE25S161

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10-11. Write Suspend (WSUS)

The Write Suspend (WSUS) allow the system to interrupt Small Sector Erase (SSE), Sector Erase (SE), Chip Erase (CHE)

or Page Program (PP, PPL).

"Figure 15. Write Suspend (WSUS)" shows the timing waveforms.

The sequence of WSUS operation :

CS goes to low  input WSUS command (B0h)

 CS goes to high (be executed by the rising CS edge)

After the command has been input, the device becomes consumption current equivalent to standby within 20 us. The

recovery time (tRSUS) is needed before next command from suspend. The internal operation status could be checked by

using status register RDY bit or SUS bit, but the device will not accept another command until it is ready.

• The Write Suspend is valid Erase cycle (SSE, SE and CHE) or Program cycle (PP, PPL).

• If the Erase (SSE, SE, CHE) or Program (PP, PPL) entry during the suspension, the suspension will be canceled

automatically. And a new Erase (SSE, SE, CHE), Program (PP, PPL) will be executed. In this case, it is

necessary to erase/program the suspended area again.

• During Write Suspend, Read (RDSR, RDLP, RDHS, RDDO, RDIO) and Resume (RESM) can be accepted.

• If the Software Reset is executed during the suspension, the suspension will be canceled automatically.

20us

Operation Current

= Isb

SCK

High Impedance

tRSUS

Recovery time

from Suspend

B0h

Mode3

Mode0

8CLK

MSB

Next Command

(Read or Resume)

Figure 15. Write Suspend (WSUS)

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