A d v a n c e I n f o r m a t i o n
START
Write Erase
Command Sequence
Data Poll
from System
Embedded
Erase
algorithm
in progress
No
Data = FFh?
Yes
Erasure Completed
Notes:
1. See Table 12 on page 41 for erase command sequence.
2. See DQ3: Sector Erase Timer‚ on page 29 for more information.
Figure 4. Erase Operation
Table 5. S29AL004D Command Definitions (Sheet 1 of 2)
Bus Cycles (Notes 2-5)
Third Fourth
Addr Data Addr Data
Command
Sequence
(Note 1)
First
Second
Fifth
Sixth
Addr Data Addr Data
Addr Data Addr Data
Read (Note 6)
Reset (Note 7)
1
1
RA
RD
F0
XXX
555
AAA
555
AAA
555
AAA
Word
Byte
Word
Byte
Word
Byte
2AA
555
2AA
555
2AA
555
555
AAA
555
AAA
555
AAA
Manufacturer ID
4
4
4
AA
AA
AA
55
55
55
90
90
90
X00
01
X01
X02
X01
X02
22B9
B9
Device ID,
Top Boot Block
22BA
BA
Device ID,
Bottom Boot Block
XX00
XX01
00
(SA)
X02
Word
Byte
555
AAA
2AA
555
555
AAA
Sector Protect Verify
(Note 9)
4
AA
55
55
90
(SA)
X04
01
Word
Byte
Word
Byte
555
AAA
555
AAA
XXX
2AA
555
2AA
555
PA
555
AAA
555
AAA
Program
4
AA
AA
A0
20
PA
PD
Unlock Bypass
55
PD
3
Unlock Bypass Program (Note 10)
A0
90
2
2
00
(F0h)
Unlock Bypass Reset (Note 11)
XXX
XXX
Word
Byte
555
AAA
2AA
555
555
AAA
555
AAA
2AA
555
555
AAA
Chip Erase
6
AA
55
80
AA
55
10
24
S29AL004D
S29AL004D_00_A1 February 18, 2005
SPANSION [ SPANSION ]
