P R E L I M I N A R Y
START
Write Erase
Command Sequence
Data Poll
from System
Embedded
Erase
algorithm
in progress
No
Data = FFh?
Yes
Erasure Completed
Notes:
1. See Table 5 for erase command sequence.
2. See “DQ3: Sector Erase Timer” for more information.
Figure 1. Erase Operation
Table 5. Am29LV800D Command Definitions
Bus Cycles (Notes 2-5)
Third Fourth
Addr Data Addr Data Addr Data Addr Data
Command
Sequence
(Note 1)
First
Second
Fifth
Sixth
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 22DA
X02 DA
X01 225B
Device ID,
Top Boot Block
Device ID,
Bottom Boot Block
X02
5B
XX00
XX01
00
(SA)
X02
Word
Byte
555
AAA
2AA
555
555
AAA
Sector Protect Verify
(Note 9)
4
4
AA
AA
55
55
90
(SA)
X04
01
Word
Byte
Word
Byte
555
AAA
555
AAA
2AA
555
2AA
555
555
AAA
555
AAA
Program
Unlock Bypass
A0
20
PA
PD
3
2
2
AA
A0
90
55
PD
00
Unlock Bypass Program (Note
10)
XXX
XXX
PA
Unlock Bypass Reset (Note
11)
XXX
January 21, 2005 Am29LV800D_00_A4_E
Am29LV800D
21
AMD [ AMD ]
