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| 型號： | Am29LV640DH90RZE |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 8 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor |
| 中文描述： | 64兆位（4個(gè)M x 16位），3.0伏的CMOS只均勻部門閃光控制記憶與VersatileI |
| 文件頁數(shù)： | 24/57頁 |
| 文件大?。?/td> | 1467K |
| 代理商： | AM29LV640DH90RZE |
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September 20, 2002
Am29LV640D/Am29LV641D
29
Command Definitions
Table 10.
Command Definitions
Legend:
X = Don’t care
RA = Address of the memory location to be read.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. Addresses
latch on the falling edge of the WE# or CE# pulse, whichever happens
later.
PD = Data to be programmed at location PA. Data latches on the rising
edge of WE# or CE# pulse, whichever happens first.
SA = Address of the sector to be verified (in autoselect mode) or
erased. Address bits A21–A15 uniquely select any sector.
Notes:
1.
See Table 1 for description of bus operations.
2.
All values are in hexadecimal.
3.
Except for the read cycle and the fourth cycle of the autoselect
command sequence, all bus cycles are write cycles.
4.
During unlock cycles, (when lower address bits are 555 or 2AAh
as shown in table) address bits higher than A11 (except where BA
is required) and data bits higher than DQ7 are don’t cares.
5.
No unlock or command cycles required when device is in read
mode.
6.
The Reset command is required to return to the read mode (or to
the erase-suspend-read mode if previously in Erase Suspend)
when the device is in the autoselect mode, or if DQ5 goes high
(while the device is providing status information).
7.
The fourth cycle of the autoselect command sequence is a read
cycle. Data bits DQ15–DQ8 are don’t care. See the Autoselect
Command Sequence section for more information.
8.
If WP# protects the highest address sector (or if WP# is not
available), the data is 98h for factory locked and 18h for not
factory locked. If WP# protects the lowest address sector, the
data is 88h for factory locked and 08h for not factor locked.
9.
The data is 00h for an unprotected sector group and 01h for a
protected sector group.
10. The Unlock Bypass command is required prior to the Unlock
Bypass Program command.
11. The Unlock Bypass Reset command is required to return to the
read mode when the device is in the unlock bypass mode.
12. The system may read and program in non-erasing sectors, or
enter the autoselect mode, when in the Erase Suspend mode.
The Erase Suspend command is valid only during a sector erase
operation.
13. The Erase Resume command is valid only during the Erase
Suspend mode.
14. Command is valid when device is ready to read array data or when
device is in autoselect mode.
Command
Sequence
C
ycl
es
Bus Cycles (Notes 1–4)
First
Second
Third
Fourth
Fifth
Sixth
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Read (Note 5)
1
RA
RD
Reset (Note 6)
1
XXX
F0
Aut
o
s
e
lec
t(N
Manufacturer ID
4
555
AA
2AA
55
555
90
X00
0001
Device ID
4
555
AA
2AA
55
555
90
X01
22D7
SecSi
Sector Factory
Protect (Note 8)
4
555
AA
2AA
55
555
90
X03
(see
Note 8)
Sector Group Protect Verify
4
555
AA
2AA
55
555
90
(SA)X02
XX00/
XX01
Enter SecSi Sector Region
3
555
AA
2AA
55
555
88
Exit SecSi Sector Region
4
555
AA
2AA
55
555
90
XXX
00
Program
4
555
AA
2AA
55
555
A0
PA
PD
Unlock Bypass
3
555
AA
2AA
55
555
20
Unlock Bypass Program (Note 10)
2
XXX
A0
PA
PD
Unlock Bypass Reset (Note 11)
2
XXX
90
XXX
00
Chip Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
555
10
Sector Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
SA
30
Erase Suspend (Note 12)
1
BA
B0
Erase Resume (Note 13)
1
BA
30
CFI Query (Note 14)
1
55
98
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