EFST
preliminary
F49L004UA / F49L004BA
Table 5. F49L004UA/ F49L004BA Software Command Definitions
1st Bus
Cycle
2nd Bus
Cycle
3rd Bus
Cycle
4th Bus
Cycle
5th Bus
Cycle
6th Bus
Cycle
Bus
Command
Cycles
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
Reset (5)
Read (4)
1
1
4
6
6
XXXH F0H
RA RD
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Program
555H AAH 2AAH 55H 555H A0H
PA
PD
Chip Erase
Sector Erase
555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H 555H 10H
555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H
SA
30H
Sector Erase
Suspend (6)
1
1
XXXH B0H
XXXH 30H
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Sector Erase Resume
(7)
-
-
-
Auto-select
See Table 6.
Notes:
1. X = don’t care
RA = Address of memory location to be read.
RD = Data to be read at location RA.
PA = Address of memory location to be programmed.
PD = Data to be programmed at location PA.
SA = Address of the sector.
2. Except Read command and Auto-select command, all command bus cycles are write operations.
3. Address bits A18–A11 are don’t cares.
4. No command cycles required when reading array data.
5. The Reset command is required to return to reading array data when device is in the auto-select mode, or if
DQ5 goes high(while the device is providing status data).
6. The system may read and program in non-erasing sectors, or enter the auto-select mode, when in the Erase
Suspend mode. The Erase Suspend command is valid only during a sector erase operation.
7. The Erase Resume command is valid only during the Erase Suspend mode.
Table 6. F49L004UA/ F49L004BA Auto-Select Command
1st Bus
Cycle
2nd Bus
Cycle
3rd Bus
Cycle
4th Bus
Cycle
5th Bus
Cycle
6th Bus
Cycle
Bus
Command
Cycles
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
4
4
4
4
555H AAH 2AAH 55H 555H 90H X04H 7FH
555H AAH 2AAH 55H 555H 90H X08H 7FH
555H AAH 2AAH 55H 555H 90H X0CH 7FH
555H AAH 2AAH 55H 555H 90H X00H 8CH
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Manufacture ID
Device ID, Upper
boot
4
4
555H AAH 2AAH 55H 555H 90H X01H B5H
555H AAH 2AAH 55H 555H 90H X01H B6H
-
-
-
-
-
-
-
-
Device ID, Bottom
boot
(SA) 00H
555H AAH 2AAH 55H 555H 90H
x02H 01H
Sector Protect Verify
4
-
-
-
-
Notes :
1. The fourth cycle of the auto-select command sequence is a read cycle.
2. For Sector Protect Verify operation: If read out data is 01H, it means the sector has been protected. If read out
data is 00H, it means the sector is still not being protected.
Elite Flash Storage Technology Inc.
Publication Date : Aug. 2003
Revision: 0.2 10/46
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
