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(wàn)的CMOS低壓閃存）
文件頁(yè)數(shù)： 14/44頁(yè)
文件大?。?/td> 249K
代理商： ΜPD29F008AL-X
Preliminary Data Sheet
14
μ
PD29F008AL-X
4. Commands
The commands of this device and the command write method are described below.
4.1 Writing Commands
The write cycle of a standard microprocessor is used for command write.
Commands are written to the command register. The command register functions to latch addresses and data
required for instruction execution, and does not take up memory.
When an incorrect address or data is written, or addresses and data are written in an incorrect sequence, the device
is reset to the read mode.
Table 4-1 lists the commands and command sequence.
Table 4-1. Command Sequence
Command sequence
Bus
1st bus cycle
2nd bus cycle
3rd bus cycle
4th bus cycle
5th bus cycle
6th bus cycle
cycles
Address
Data
Address
Data
Address
Data
Address
Data
Address
Data
Address
Data
Read / Reset
Note 1
1
×××
H
F0H
–
–
–
–
–
–
–
–
–
–
Read / Reset
Note 1
3
555H
AAH
2AAH
55H
555H
F0H
RA
RD
–
–
–
–
Read product ID code
3
555H
AAH
2AAH
55H
555H
90H
IA
ID
–
–
–
–
Program
4
555H
AAH
2AAH
55H
555H
A0H
PA
PD
–
–
–
–
Chip erase
6
555H
AAH
2AAH
55H
555H
80H
555H
AAH
2AAH
55H
555H
10H
Sector erase
6
555H
AAH
2AAH
55H
555H
80H
555H
AAH
2AAH
55H
SA
30H
Sector erase suspend
Note 2
1
×××
H
B0H
–
–
–
–
–
–
–
–
–
–
Sector erase resume
Note 3
1
×××
H
30H
–
–
–
–
–
–
–
–
–
–
Unlock bypass set
3
555H
AAH
2AAH
55H
555H
20H
–
–
–
–
–
–
Unlock bypass program
2
×××
H
A0H
PA
PD
–
–
–
–
–
–
–
–
Unlock bypass reset
2
×××
H
90H
×××
H
00H
–
–
–
–
–
–
–
–
Notes 1.
The device is reset to read mode by either the read or reset command.
2.
If B0H is input to any address during sector erase, erase is suspended.
3.
If 30H is input to any address during sector erase suspend, erase is resumed.
Remarks 1.
RA : Read address.
RD : Read data.
PA : Program address.
PD : Program data.
SA : Erase address. Select the sector to be erased with a combination of A13 to A19. See section
2.
Sector Configuration / Sector Address Table
.
IA : 00000H (If reading the manufacturer code).
: 00001H (If reading the device code).
ID : 10H (manufacturer code).
: 3EH (B
××
T type device code), 4EH (C
××
T type device code)
: 37H (B
××
B type device code), 47H (C
××
B type device code)
2.
A11 to A19 are Don't Care except when selecting a program / erase address.
3.
For the bus operation, see section
3. Bus Operation
.
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