E28F004BX-B120 INTEL [Intel Corporation], E28F004BX-B120 Datasheet - Page 27

• Manufacturer Part Number: E28F004BX-B120
• Description: 4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY
• Manufacturer: INTEL [Intel Corporation]

Full Status Check Procedure
Figure 14 Automated Block Erase Flowchart
290451– 10
290451– 11
Operation
Write
Write
Read
Standby
Repeat for subsequent blocks
Full status check can be done after each block or after a
sequence of blocks
Write FFH after the last block erase operation to reset the
device to Read Array Mode
Operation
Standby
Standby
Standby
SR 3 MUST be cleared if set during an erase attempt
before further attempts are allowed by the Write State
Machine
SR 5 is only cleared by the Clear Status Register
Command in cases where multiple blocks are erased
before full status is checked
If error is detected clear the Status Register before
attempting retry or other error recovery
Bus
Bus
Command
Setup
Erase
Erase
Command
28F400BX-T B 28F004BX-T B
Data
Address
erased
Data
Address
erased
Status Register Data
Toggle OE
Status Register
Check SR 7
1
Check SR 3
1
Check SR 4 5
Both 1
Error
Check SR 5
1
e
e
e
Ready 0
V
Block Erase Error
e
e
PP
e
20H
D0H
e
e
Low Detect
Comments
Comments
Command Sequence
Within block to be
Within block to be
or CE
e
Busy
to update
27