FLASH MEMORY

40

Preliminary

K9G8G08U0A

K9LAG08U1A

K9G8G08B0A

READ STATUS

The device contains a Status Register which may be read to find out whether program or erase operation is completed, and whether

the program or erase operation is completed successfully. After writing 70h or F1h command to the command register, a read cycle

outputs the content of the Status Register to the I/O pins on the falling edge of CE or RE, whichever occurs last. This two line control

allows the system to poll the progress of each device in multiple memory connections even when R/B pins are common-wired. RE or

CE does not need to be toggled for updated status. Refer to table 3 and Table 4 for specific F1h Status Register definitions. The com-

mand register remains in Status Read mode until further commands are issued to it. Therefore, if the status register is read during a

random read cycle, the read command(00h) should be given before starting read cycles.

Table 3. Read Status Register Definition

NOTE :

1. I/Os defined ’Not use’ are recommended to be masked out when Read Status is being executed.

I/O No.

Page Program

Block Erase

Read

Definition

I/O 0

Pass/Fail

Pass/Fail

Not use

Pass : "0"

Fail : "1"

I/O 1

Not use

Not use

Not use

Don’t -cared

I/O 2

Not use

Not use

Not use

Don’t -cared

I/O 3

Not Use

Not Use

Not Use

Don’t -cared

I/O 4

Not Use

Not Use

Not Use

Don’t -cared

I/O 5

Not Use

Not Use

Not Use

Don’t -cared

I/O 6

Ready/Busy

Ready/Busy

Ready/Busy

Busy : "0"

Ready : "1"

I/O 7

Write Protect

Write Protect

Write Protect

Protected : "0"

Not Protected : "1"

Table 4. F1h Read Status Register Definition

NOTE :

1. I/Os defined ’Not use’ are recommended to be masked out when Read Status is being executed.

I/O No.

Page Program

Block Erase

Read

Definition

I/O 0

Chip Pass/Fail

Chip Pass/Fail

Not use

Pass : "0"

Fail : "1"

I/O 1

Plane0 Pass/Fail

Plane0 Pass/Fail

Not use

Pass : "0"

Fail : "1"

I/O 2

Plane1 Pass/Fail

Plane1 Pass/Fail

Not use

Pass : "0"

Fail : "1"

I/O 3

Not Use

Not Use

Not Use

Don’t -cared

I/O 4

Not Use

Not Use

Not Use

Don’t -cared

I/O 5

Not Use

Not Use

Not Use

Don’t -cared

I/O 6

Ready/Busy

Ready/Busy

Ready/Busy

Busy : "0"

Ready : "1"

I/O 7

Write Protect

Write Protect

Write Protect

Protected : "0"

Not Protected : "1"