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參數(shù)資料
| 型號(hào)： | L29S800F |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8MEGABIT (1M】8 /512K】16) 3 VOLT CMOS FLASH MEMERY |
| 中文描述： | 8MEGABIT（100萬】8 / 16】為512k）3伏的CMOS閃存MEMERY |
| 文件頁數(shù)： | 20/54頁 |
| 文件大?。?/td> | 797K |
| 代理商： | L29S800F |
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L29S800F
PRELIMINARY
A
8MEGABIT (1M×8 /512K×16)
3 VOLT CMOS FLASH MEMERY
LinkSmart
20
071802
Extended Command
(1) Fast Mode
L29S800F/-B has Fast Mode function. This mode dispenses with the initial two unclock cycles
required in the standard program command sequence by writing Fast Mode command into the
command register. In this mode, the required bus cycle for programming is two cycles instead of
four bus cycles in standard program command. (Do not write erase command in this mode.) The
read operation is also executed after exiting this mode. To exit this mode, it is necessary to write
Fast Mode Reset command into the command register. (Refer to the Figure 27 Extended
algorithm.) The V
CC
active current is required even
CE
= V
IH
during Fast Mode.
(2) Fast Programming
During Fast Mode, the programming can be executed with two bus cycles operation. The
Embedded Program Algorithm is executed by writing program set-up command (A0H) and data
write cycles (PA/PD). (Refer to the Figure 27 Extended algorithm.)
(3) Extended Sector Protection
In addition to normal sector protection, the L29S800F/-B has Extended Sector Protection as
extended function. This function enable to protect sector by forcing V
ID
on
RESET
pin and write a
command sequence. Unlike conventional procedure, it is not necessary to force V
ID
and control
timing for control pins. The only
RESET
pin requires V
ID
for sector protection in this mode. The
extended sector protect requires V
ID
on
RESET
pin. With this condition, the operation is initiated
by writing the set-up command (60H) into the command register. Then, the sector addresses pins
(A
18
, A
17
, A
16
, A
15
, A
14
, A
13
and A
12
) and (A
6
, A
1
, A
0
) = (0, 1, 0) should be set to the sector to be
protected (recommend to set V
IL
for the other addresses pins), and write extended sector protect
command (60H). A sector is typically protected in 150 ms. To verify programming of the protection
circuitry, the sector addresses pins (A
18
, A
17
, A
16
, A
15
, A
14
, A
13
and A
12
) and (A
6
, A
1
, A
0
) = (0, 1, 0)
should be set and write a command (40H). Following the command write, a logical “1” at device
output DQ
0
will produce for protected sector in the read operation. If the output data is logical “0”,
please repeat to write extended sector protect command (60H) again. To terminate the operation, it
is necessary to set
RESET
pin to V
IH
.
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