MBM29DL800BA-70 データシートの表示（PDF） - Spansion Inc.

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MBM29DL800BA-70

8M (1M X 8/512K X 16) BIT

Spansion Inc. 

MBM29DL800TA-70/90/MBM29DL800BA-70/90

Write Operation Status

Detailed in “Hardware Sequence Flags Table” are all the status flags that can determine the status of the bank

for the current mode operation. The read operation from the bank where is not operate Embedded Algorithm

returns a data of memory cell. These bits offer a method for determining whether a Embedded Algorithm is

completed properly. The information on DQ2 is address sensitive. This means that if an address from an erasing

sector is consectively read, then the DQ2 bit will toggle. However, DQ2 will not toggle if an address from a non-

erasing sector is consectively read. This allows the user to determine which sectors are erasing and which are not.

The status flag is not output from bank (non-busy bank) not executing Embedded Algorithm. For example, there

is bank (busy bank) which is now executing Embedded Algorithm. When the read sequence is [1] <busy bank>,

[2] <non-busy bank>, [3] <busy bank>, the DQ6 is toggling in the case of [1] and [3]. In case of [2], the data of

memory cell is outputted. In the erase-suspend read mode with the same read sequence, DQ6 will not be toggled

in the [1] and [3].

In the erase suspend read mode, DQ2 is toggled in the [1] and [3]. In case of [2], the data of memory cell is

outputted.

Hardware Sequence Flags Table

Status

Embedded Program Algorithm

Embedded Erase Algorithm

In Progress

Erase

Suspended

Mode

Erase Suspend Read

(Erase Suspended Sector)

Erase Suspend Read

(Non-Erase Suspended Sector)

Erase Suspend Program

(Non-Erase Suspended Sector)

Embedded Program Algorithm

Exceeded Embedded Erase Algorithm

Time Limits

Erase

Suspended

Mode

Erase Suspend Program

(Non-Erase Suspended Sector)

DQ7 DQ6 DQ5 DQ3 DQ2

DQ7 Toggle 0 0

1

0 Toggle 0 1 Toggle*1

1

1

0 0 Toggle

Data Data Data Data Data

DQ7 Toggle 0 0

1*2

DQ7 Toggle 1 0

1

0 Toggle 1 1 N/A

DQ7 Toggle 1 0 N/A

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

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

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