M29W640DT(2004) データシートの表示（PDF） - STMicroelectronics

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M29W640DT
(Rev.:2004)

64 Mbit (8Mb x8 or 4Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

M29W640DT, M29W640DB

Table 7. Status Register Bits

Operation

Address

DQ7

DQ6

DQ5

DQ3

DQ2

RB

Program

Any Address

DQ7

Toggle

0

–

–

0

Program During Erase

Suspend

Any Address

DQ7

Toggle

0

–

–

0

Program Error

Any Address

DQ7

Toggle

1

–

–

Hi-Z

Chip Erase

Any Address

0

Toggle

0

1

Toggle

Hi-Z

Block Erase before

timeout

Erasing Block

0

Toggle

0

Non-Erasing Block

0

Toggle

0

0

Toggle

0

0

No Toggle

0

Block Erase

Erasing Block

0

Toggle

0

Non-Erasing Block

0

Toggle

0

1

Toggle

Hi-Z

1

No Toggle

0

Erase Suspend

Erasing Block

Non-Erasing Block

1

No Toggle

0

–

Data read as normal

Toggle

Hi-Z

Hi-Z

Erase Error

Good Block Address

0

Toggle

1

Faulty Block Address

0

Toggle

1

Note: Unspecified data bits should be ignored.

1

No Toggle

0

1

Toggle

0

Figure 5. Data Polling Flowchart

Figure 6. Data Toggle Flowchart

START

READ DQ5 & DQ7

at VALID ADDRESS

DQ7

=

YES

DATA

NO

NO DQ5

=1

YES

READ DQ7

at VALID ADDRESS

DQ7

=

YES

DATA

NO

FAIL

PASS

AI90194

START

READ DQ6

READ

DQ5 & DQ6

DQ= 6

NO

TOGGLE

YES

NO DQ5

=1

YES

READ DQ6

TWICE

DQ= 6

NO

TOGGLE

YES

FAIL

PASS

AI90195B

18/49

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