8 Mbit Firmware Hub
SST49LF008A
Data Sheet
SOFTWARE COMMAND SEQUENCE
TABLE 9: Software Command Sequence
1st1
Write Cycle
2nd1
Write Cycle
3rd1
Write Cycle
4th1
Write Cycle
5th1
Write Cycle
6th1
Write Cycle
Command Sequence
Addr2 Data
Addr2 Data Addr2 Data Addr2 Data Addr2
Data Addr2 Data
Byte-Program
Sector-Erase
5555H AAH 2AAAH 55H 5555H A0H Data
BA3
4
5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H
5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H
SAX
BAX
30H
50H
5
Block-Erase
Chip-Erase6
5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 10H
5555H AAH 2AAAH 55H 5555H 90H
Software ID Entry7,8
Software ID Exit9
Software ID Exit9
XXH
F0H
5555H AAH 2AAAH 55H 5555H F0H
T9.6 1161
1. FWH Mode uses consecutive Write cycles to complete a command sequence; PP Mode uses consecutive bus cycles to complete a
command sequence.
2. Address format A14-A0 (Hex), Addresses A21-A15 can be VIL or VIH, but no other value, for the Command sequence in PP Mode.
3. BA = Program Byte address
4. SAX for Sector-Erase Address
5. BAX for Block-Erase Address
6. Chip-Erase is supported in PP Mode only
7. SST Manufacturer’s ID = BFH, is read with A0=0,
With A19-A1 = 0; 49LF008A Device ID = 5AH, is read with A0 = 1.
8. The device does not remain in Software Product ID mode if powered down.
9. Both Software ID Exit operations are equivalent.
©2006 Silicon Storage Technology, Inc.
S71161-11-000
3/06
20
SST [ SILICON STORAGE TECHNOLOGY, INC ]
