參數(shù)資料
型號(hào)： AM29LV004B-90REC
廠商： ADVANCED MICRO DEVICES INC
元件分類： PROM
英文描述： 4 Megabit (512 K x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory
中文描述： 512K X 8 FLASH 3V PROM, 90 ns, PDSO40
封裝： TSOP-40
文件頁(yè)數(shù)： 15/36頁(yè)
文件大?。?/td> 455K
代理商： AM29LV004B-90REC
Am29LV004
15
P R E L I M I N A R Y
Table 5.
Am29LV004 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 A18–A13 uniquely select any sector.
Notes:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autoselect data, all
commandbus cycles are write operations.
4. Address bits A18–A11 are don’t cares for unlock and
command cycles.
5. No unlock or command cycles required when reading array
data.
6. The Reset command is required to return to reading array
data when device is in the autoselect mode, or if DQ5 goes
high (while the device is providing status data).
7. The fourth cycle of the autoselect command sequence is a
read cycle.
8. The data is 00h for an unprotected sector and 01h for a
protected sector. See “Autoselect Command Sequence” for
more information.
9. 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.
10. The Erase Resume command is valid only during the Erase
Suspend mode.
Command
Sequence
(Note 1)
Bus Cycles (Notes 2-4)
Third
Addr
Data
First
Second
Addr
Fourth
Addr
Fifth
Sixth
Addr
RA
XXX
555
555
555
Data
RD
F0
AA
AA
AA
Data
Data
Addr Data
Addr
Data
Read (Note 5)
Reset (Note 6)
1
1
4
4
4
Auto-
select
(Note 7)
Manufacturer ID
Device ID, Top Boot Block
Device ID, Bottom Boot Block
2AA
2AA
2AA
55
55
55
555
555
555
90
90
90
X00
X01
X01
01
B5
B6
00
01
PD
AA
AA
Sector Protect Verify
(Note 8)
4
555
AA
2AA
55
555
90
(SA)
X02
Program
Chip Erase
Sector Erase
Erase Suspend (Note 9)
Erase Resume (Note 10)
4
6
6
1
1
555
555
555
XXX
XXX
AA
AA
AA
B0
30
2AA
2AA
2AA
55
55
55
555
555
555
A0
80
80
PA
555
555
2AA
2AA
55
55
555
SA
10
30
C
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