Figure 4
Erase Algorithm
Bus
Operations
Standby
Write
Read
Standby
Command
Sequence
Comments
Erase
Data Polling to Verify Erasure
Compare Output to FFH
Start
Write Erase Command Sequence
(See Below)
Data Poll or Toggle Bit
Successfully Completed
Erasure Completed
Chip Erase Command Sequence
(Address/Command)
Individual Sector/Multiple Sector
Erase Command Sequence
(Address/Command)
5555H/AAH
5555H/AAH
2AAAH/55H
2AAAH/55H
5555H/80H
5555H/80H
5555H/AAH
5555H/AAH
2AAAH/55H
2AAAH/55H
5555H/10H
Sector Address/30H
Sector Address/30H
Additional Sector
Erase Commands
are Optional
Sector Address/30H
Note 1. To Ensure the command has been accepted, the system software should check the
status of D3 prior to and following each subsequent sector erase command. If D3 were high on
the second status check, the command may not have been accepted.
Aeroflex Circuit Technology
11
SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
