MBM29F017A データシートの表示（PDF） - Spansion Inc.

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コンポーネント説明

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MBM29F017A

FLASH MEMORY CMOS 16M (2M × 8) BIT

Spansion Inc. 

MBM29F017A-70/-90/-12

Any other command written during the Erase Suspend mode will be ignored except the Erase Resume command.

Writing the Erase Resume command resumes the erase operation. The addresses are “don't-cares” when writing

the Erase Suspend or Erase Resume command.

When the Erase Suspend command is written during the Sector Erase operation, the device will take a maximum

of 15 ms to suspend the erase operation. When the device has entered the erase-suspended mode, the RY/BY

output pin and the DQ7 bit will be at logic “1”, and DQ6 will stop toggling. The user must use the address of the

erasing sector for reading DQ6 and DQ7 to determine if the erase operation has been suspended. Further writes

of the Erase Suspend command are ignored.

When the erase operation has been suspended, the device defaults to the erase-suspend-read mode. Reading

data in this mode is the same as reading from the standard read mode except that the data must be read from

sectors that have not been erase-suspended. Successively reading from the erase-suspended sector while the

device is in the erase-suspend-read mode will cause DQ2 to toggle. (See the section on DQ2.)

After entering the erase-suspend-read mode, the user can program the device by writing the appropriate com-

mand sequence for Byte Program. This program mode is known as the erase-suspend-program mode. Again,

programming in this mode is the same as programming in the regular Byte Program mode except that the data

must be programmed to sectors that are not erase-suspended. Successively reading from the erase-suspended

sector while the device is in the erase-suspend-program mode will cause DQ2 to toggle. The end of the erase-

suspended program operation is detected by the RY/BY output pin, Data polling of DQ7, or by the Toggle Bit I

(DQ6) which is the same as the regular Byte Program operation. Note that DQ7 must be read from the byte

program address while DQ6 can be read from any address.

To resume the operation of Sector Erase, the Resume command (30h) should be written. Any further writes of

the Resume command at this point will be ignored. Another Erase Suspend command can be written after the

chip has resumed erasing.

Write Operation Status

Hardware Sequence Flags Table

In progress

Exceeded

Time Limits

Status

Embedded ProgramTM Algorithm

Embedded EraseTM Algorithm

Erase

Suspended

Mode

Erase Suspend Read

(Erase Suspended Sector)

Erase Suspend Read

(Non-Erase Suspended Sector)

Erase Suspend Program

(Non-Erase Suspended Sector)

Embedded ProgramTM Algorithm

Embedded EraseTM Algorithm

Erase

Suspended

Mode

Erase Suspend Program

(Non-Erase Suspended Sector)

DQ7

DQ6

DQ5

DQ7 Toggle

0

0 Toggle 0

1

1

0

Data Data Data

DQ7 Toggle*1 0

DQ7 Toggle

1

0 Toggle 1

DQ7 Toggle

1

DQ3

DQ2

0

1

1 Toggle

0 Toggle

Data Data

0

1*2

0

1

1

N/A

0

N/A

*1 : Performing successive read operations from any address will cause DQ6 to toggle.

*2 : Reading the byte address being programmed while in the erase-suspend program mode will indicate logic “1”

at the DQ2 bit. However, successive reads from the erase-suspended sector will cause DQ2 to toggle.

Notes : • DQ0 and DQ1 are reserved pins for future use.

• DQ4 is Fujitsu internal use only.

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