MBM29PL65LM90TN datasheet(24/56 Pages) SPANSION

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MBM29PL65LM-90/10

Hardware Sequence Flags Table

*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 “ s FLOW 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.

DQ7

Data Polling

The device features Data Polling as a method to indicate to the host that the Embedded Algorithms are in

progress or completed. During the Embedded Program Algorithm, an attempt to read the device will produce a

complement of data last written to DQ7. Upon completion of the Embedded Program Algorithm, an attempt to

read the device will produce true data last written to DQ7. During the Embedded Erase Algorithm, an attempt to

read the device will produce a “0” at the DQ7 output. Upon completion of the Embedded Erase Algorithm, an

attempt to read device will produce a “1” on DQ7. The flowchart for Data Polling (DQ7) is shown in “Data Polling

Algorithm”. For programming, the Data Polling is valid after the rising edge of the fourth write pulse in the four

write pulse sequences.

For programming, the Data Polling is valid after the rising edge of the fourth write pulse in the four write pulse

sequences.

For chip erase and sector erase, the Data Polling is valid after the rising edge of the sixth write pulse in the six

write pulse sequences. Data Polling must be performed at sector addresses of sectors being erased, not pro-

tected sectors. Otherwise the status may become invalid.

If a program address falls within a protected sector, Data Polling on DQ7 is active for approximately 1

µs, then

that bank returns to the read mode. After an erase command sequence is written, if all sectors selected for

erasing are protected, Data Polling on DQ7 is active for approximately 400

µs, then the bank returns to read mode.

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 Suspend Sector)

Data

Program-Supend -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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