MBM29PL64LM90PCN datasheet(30/69 Pages) SPANSION

30 / 69 page

MBM29PL64LM90/10

Write Operation Status

Detailed in “Hardware Sequence Flags” are all the status flags which can determine the status of the device for

current mode operation. When checking Hardware Sequence Flags during program operation, it should be

checked 4

µs after issuing program command. During sector erase, the part provides the status flags automat-

ically to the I/O ports. The information on DQ2 is address sensitive. If an address from an erasing sector is

consecutively read, then the DQ2 bit will toggle. However DQ2 will not toggle if an address from a non-erasing

sector is consecutively read. This allows the user to determine which sectors are erasing.

Once erase suspend is entered address sensitivity still applies. If the address of a non-erasing sector (one

available for read) is provided, then stored data can be read from the device. If the address of an erasing sector

(one unavailable for read) is applied, the device will output its status bits.

Hardware Sequence Flags

*1 : Successive reads from the erasing or erase-suspend sector will cause DQ2 to toggle.

*2 : Reading from non-erase suspend sector address will indicate logic “1” at the DQ2 bit.

*3 : DQ1 indicates the Write-to-Buffer ABORT status during Write-Buffer-Programming operations.

*4 : The Data Polling algorithm detailed in “Data Polling Algorithm” in sFLOW CHART should be used for Write-

Buffer-Programming operations. Note that DQ7 during Write-Buffer-Programming indicates the data-bar for

DQ7 data for the LAST LOADED WRITE-BUFFER ADDRESS location.

Status

DQ7

DQ6

DQ5

DQ3

DQ2

DQ1*3

Progress

Embedded Program Algorithm

DQ7

Toggle

Embedded Erase Algorithm

Toggle

Toggle*1

N/A

Program

Suspend

Mode

Program-Suspend-Read

(Program Suspended Sector)

Data

Program-Suspend-Read

(Non-Program Suspended Sector)

Data

Erase

Suspend

Mode

Erase-Suspend-Read

(Erase Suspended Sector)

Toggle*1

N/A

Erase-Suspend-Read

(Non-Erase Suspended Sector)

Data

Erase-Suspend-Program

(Non-Erase Suspended Sector)

DQ7

Toggle

1*2

N/A

Exceeded

Time

Limits

Embedded Program Algorithm

DQ7

Toggle

N/A

Embedded Erase Algorithm

Toggle

N/A

Erase

Suspend

Mode

Erase-Suspend-Program

(Non-Erase Suspended Sector)

DQ7

Toggle

N/A

Write to

Buffer*4

BUSY State

DQ7

Toggle

N/A

Exceeded Timing Limits

DQ7

Toggle

N/A

ABORT State

N/A

Toggle

N/A

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