28F016SA datasheet(18/55 Pages) INTEL

18 / 55 page

28F016SA

4.5

Compatible Status Register

WSMS

ESS

DWS

VPPS

654

321

NOTES:

CSR.7 = WRITE STATE MACHINE STATUS

1 = Ready

0 = Busy

RY/BY# output or WSMS bit must be checked to

determine completion of an operation (erase

suspend, block erase or data program) before the

appropriate Status bit (ESS, ES or DWS) is

checked for success.

CSR.6 = ERASE-SUSPEND STATUS

1 = Erase Suspended

0 = Erase In Progress/Completed

CSR.5 = ERASE STATUS

1 = Error In Block Erasure

0 = Successful Block Erase

If DWS and ES are set to “1” during a block

erase attempt, an improper command sequence

was entered. Clear the CSR and attempt the

operation again.

CSR.4 = DATA WRITE STATUS

1 = Error in Data Program

0 = Data Program Successful

CSR.3 = VPP STATUS

1 = VPP Low Detect, Operation Abort

0 = VPP OK

The VPPS bit, unlike an A/D converter, does not

provide continuous indication of VPP level. The

WSM interrogates VPP’s level only after the Data

Program or Block Erase command sequences

have been entered, and informs the system if

VPP has not been switched on. VPPS is not

guaranteed to report accurate feedback between

VPPL and VPPH.

CSR.2–0 = RESERVED FOR FUTURE ENHANCEMENTS

These bits are reserved for future use; mask them out when polling the CSR.

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