K9F5616U0C-YCB0,YIB0,PCB0,PIB0

FLASH MEMORY

30

K9F5616U0C-DCB0,DIB0,HCB0,HIB0

K9F5608U0C-YCB0,YIB0,PCB0,PIB0

K9F5608U0C-DCB0,DIB0,HCB0,HIB0

K9F5608Q0C-DCB0,DIB0,HCB0,HIB0

K9F5616Q0C-DCB0,DIB0,HCB0,HIB0

K9F5608U0C-VCB0,VIB0,FCB0,FIB0

Figure 12. Block Erase Operation

BLOCK ERASE

The Erase operation is done on a block basis. Block address loading is accomplished in two cycles initiated by an Erase Setup com-

address loading initiates the internal erasing process. This two-step sequence of setup followed by execution command ensures that

memory contents are not accidentally erased due to external noise conditions.

At the rising edge of WE after the erase confirm command input, the internal write controller handles erase and erase-verify. When

the erase operation is completed, the Write Status Bit(I/O 0) may be checked. Figure 12 details the sequence.

60h

R/B

Address Input(2Cycle)

Pass

D0h

70h

Fail

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 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 4 for specific Status Register definitions. The command 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, a read command(00h or 50h) should be given before sequential page read cycle.

Table4. Read Status Register Definition

I/O #

Status

Definition

I/O 0

Program / Erase

"0" : Successful Program / Erase

"1" : Error in Program / Erase

I/O 1

Reserved for Future

Use

"0"

I/O 2

"0"

I/O 3

"0"

I/O 4

"0"

I/O 5

"0"

I/O 6

Device Operation

"0" : Busy

"1" : Ready

I/O 7

Write Protect

"0" : Protected

"1" : Not Protected

I/O 8~15

Not use

Don’t care

I/Ox