MF82M1-GMCAVXX Ver la hoja de datos (PDF) - Mitsumi

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MF82M1-GMCAVXX

8/16-bit Data Bus Flash Memory Card

Mitsumi 

Erase Suspend/Erase Resume

The erase suspend command B0h (B0B0h for 16

bit operation) is a command to generate erase

interruption and to read data from another block

of selected memory zone. By writing in the

control register erase resume command D0h

(D0D0h for 16 bit operation), the memory block will

continue the erase operation.

These commands must be executed in erase

algorithm.

(For details please refer to the algorithm)

Read Status Register

The Read status register is a command to read the

status register’s data and to make sure programme

or erase operations complete successfully. The data

of status register can be read after writing 70h

(7070h for 16 bit operation) in the control register.

The register’s read data is latched on the falling

edge of OE#. At programme or erase, the status

register’s data must be read to verify the results.

MITSUBISHI MEMORY CARD

FLASH MEMORY CARDS

Clear Status Register

The clear status register command will clear data of

status register. It is applied when 50h (5050h for 16

bit operation) is written to the control

register. If an error occurred during programme or

erase, the status register must be cleared before

retrying programme or erase.

Read Device Identifier Codes

The read device identifier codes command is

implemented by writing 90h (9090h for 16 bit

operation) to the command register. After writing

the command, manufacturer code can be read at the

address of 000000h of the zone and device code can

be read at the address 000002h of the zone. Each

card uses the same type of memory throughout and

each memory zone will respond the same code.

(Do not apply high voltage to A10 pin in order to try

and read the device identifier codes as this will

result in the card being destroyed.)

STATUS REGISTER

When operating programme or erase, it is necessary

to read status register data and to transact these bit.

Each memory IC used in this

card has internal status register to make sure

programme or erase operations complete

successfully.

7 (15) BIT

6 (14) BIT

Programme/

Erase

Erase Status Bit Suspend Bit

Note 4: ( ) ; for 16 bit operation

5 (13) BIT

Erase Error

Bit

4 (12) BIT

Programme

Error Bit

3 (11) BIT

Vcc Error

Bit

2 (10) BIT 1,0 (9,8) BIT

Programme

Reserved

Suspend Bit

Bit ; Field name

Bit ; Field name

7(15) BIT ; Programme/Erase Status Bit

0=Busy (in programming/erasing) 1=Ready

6(14) BIT ; Erase Suspend Bit

1=Erase Suspended

5(13) BIT ; Erase Error Bit

1=Erase Error

4(12) BIT ; Programme Error Bit

1=Programme Error

3(11) BIT ; Vcc Error

1=Error of voltage at Vcc

2(10) BIT ; Programme Suspend Bit

1=Programme Suspended

1,0(9,8) BIT ; Reserved for future

MITSUBISHI

ELECTRIC

6/22

Feb.1999 Rev2.0

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