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參數(shù)資料
| 型號(hào)： | μPD29F008AL-X |
| 廠商： | NEC Corp. |
| 英文描述： | 8 M-Bit CMOS Low Voltage Flash Memory(8M CMOS低壓閃存) |
| 中文描述： | 8 m位的CMOS低電壓快閃記憶體（800萬的CMOS低壓閃存） |
| 文件頁數(shù)： | 13/44頁 |
| 文件大小： | 249K |
| 代理商： | ΜPD29F008AL-X |
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Preliminary Data Sheet
13
μ
PD29F008AL-X
3.7 Temporary Sector Unprotect
Protected sector can be temporary unprotected in order to perform data program and erase.
To select the temporary sector unprotect mode, apply V
ID
to /RESET. While this mode is selected, program and
erase can be performed even for protected sectors.
When V
ID
stops being applied to /RESET, the sector is again protected.
Figure 3-3. Temporary Sector Unprotect Timing Chart
3.8 Read Product ID Code
The read product ID code function enables reading the manufacturer code and device code from the device.
This function is used for example to switch the algorithm of the program device according to the device.
To select the read product ID code mode, apply V
ID
to A9. Moreover, input V
IL
to A1 and A6, and input V
IL
to A0 to
read the manufacturer code, and V
IH
to read the device code. Other addresses are Don't Care (V
IL
is recommended.)
When read is performed, the code described in Table 3-2 is output.
The manufacturer code and device code can be read by using a command. In this case, V
ID
need not be applied to
A9. See section
4.3 Read Product ID Code
.
Table 3-2. Product ID Code
Product ID code
Inputs
Code outputs
A6
A1
A0
I/O7
I/O6
I/O5
I/O4
I/O3
I/O2
I/O1
I/O0
Hex
Manufacturer code
V
IL
V
IL
V
IL
0
0
0
1
0
0
0
0
10H
Device code
-B
××
TX
V
IL
V
IL
V
IH
0
0
1
1
1
1
1
0
3EH
-B
××
BX
V
IL
V
IL
V
IH
0
0
1
1
0
1
1
1
37H
-C
××
TX
V
IL
V
IL
V
IH
0
1
0
0
1
1
1
0
4EH
-C
××
BX
V
IL
V
IL
V
IH
0
1
0
0
0
1
1
1
47H
/RESET (Input)
/WE (Input)
/CE (Input)
RY (/BY) (Output)
V
ID
V
IH
t
VLHT
t
VLHT
(Program or erase command sequence)
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