M28W320EBT datasheet(13/45 Pages) STMICROELECTRONICS

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M28W320EBT, M28W320EBB

ditionally, if the suspend operation was Erase then

the Program, Double Word Program and Quadru-

ple Word Program commands will also be accept-

ed. Only the blocks not being erased may be read

or programmed correctly.

During a Program/Erase Suspend, the device can

be placed in a pseudo-standby mode by taking

Chip Enable to VIH. Program/Erase is aborted if

Reset turns to VIL.

See Appendix C, Figure 19, Program Suspend &

Resume Flowchart and Pseudo Code, and Figure

21, Erase Suspend & Resume Flowchart and

Pseudo Code for flowcharts for using the Program/

Erase Suspend command.

Program/Erase Resume Command

The Program/Erase Resume command can be

used to restart the Program/Erase Controller after

a Program/Erase Suspend operation has paused

it. One Bus Write cycle is required to issue the

command. Once the command is issued subse-

quent Bus Read operations read the Status Reg-

ister.

See Appendix C, Figure 19, Program or Double

Word Program Suspend & Resume Flowchart and

Pseudo Code, and Figure 21, Erase Suspend &

Resume Flowchart and Pseudo Code for flow-

charts for using the Program/Erase Resume com-

mand.

Block Protection

Two parameter/lockable blocks (blocks #0 and #1)

can be protected against Program or Erase oper-

ations. Unprotected blocks can be programmed or

erased.

To protect the two lockable blocks set Write Pro-

tect to VIL. When VPP is below VPPLK all blocks are

protected. Any attempt to Program or Erase pro-

tected blocks will abort, the data in the block will

not be changed and the Status Register outputs

the error.

Table 6, Memory Blocks Protection Truth Table,

defines the protection methods.

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