m28f008 Intel Corporation, m28f008 Datasheet - Page 12

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

M28F008
12
FULL STATUS CHECK PROCEDURE
Figure 5 Automated Byte Write Flowchart
271232 – 4
271232 – 5
Standby Read
Repeat for subsequent bytes
Full status check can be done after each byte or after a
sequence of bytes
Write FFH after the last byte write operation to reset the
device to Ready Array Mode
Operation
SR 3 MUST be cleared if set during a byte write attempt
before further attempts are allowed by the Write State
Machine
SR 4 is only cleared by the Clear Status Register Command
in cases where multiple bytes are written before full status is
checked
If error is detected clear the Status Register before
attempting retry or other error recovery
Optional
Standby
Standby
Operation
Read
Bus
Write
Write
Bus
Command
Command
Byte Write
Byte Write
Setup
CPU may already have read
Status Register data in WSM
Ready polling above
Check SR 3
1
Check SR 4
1
e
e
Data
Address
Data to be written
Address
Check RY BY
V
Read Status Register
Check SR 7
1
Toggle OE or CE to update
Status Register
V
Byte Write Error
OH
e
PP
Ready 0
e
Low Detect
e
Comments
Ready V
40H (10H)
Comments
e
e
Byte to be written
Byte to be written
or
e
OL
Busy
e
Busy