m28f008 Intel Corporation, m28f008 Datasheet - Page 13

• Manufacturer Part Number: m28f008
• Description: 8 Mbit 1 Mbit X 8 Flash Memory
• Manufacturer: Intel Corporation

FULL STATUS CHECK PROCEDURE
Figure 6 Automated Block Erase Flowchart
271232 – 6
271232 – 7
Standby Read
Repeat for subsequent bytes
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 Ready Array Mode
Operation
SR 3 MUST be cleared if set during a block 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
Optional
Standby
Standby
Standby
Operation
Read
Bus
Write
Write
Bus
Command
Command
Erase
Setup
Erase
CPU may already have read
Status Register data in WSM
Ready polling above
Check SR 3
1
Check SR 4 5
Both 1
Error
Check SR 5
1
e
e
Data
Address
erased
Data
Address
erased
Check RY BY
V
Read Status Register
Check SR 7
1
Toggle OE or CE to update
Status Register
V
Block Erase Error
OH
e
PP
e
Ready 0
e
Low Detect
e
e
Command Sequence
Comments
Ready V
20H
D0H
Comments
e
e
Within block to be
Within block to be
or
e
OL
Busy
e
M28F008
Busy
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