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參數(shù)資料
| 型號： | M29W641DL70ZA6E |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 64 Mbit 4Mb x16, Uniform Block 3V Supply Flash Memory |
| 中文描述： | 64兆位4Mb的x16插槽，統(tǒng)一座3V電源快閃記憶體 |
| 文件頁數(shù)： | 35/42頁 |
| 文件大?。?/td> | 641K |
| 代理商： | M29W641DL70ZA6E |
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M29W641DH, M29W641DL, M29W641DU
APPENDIX C. EXTENDED MEMORY BLOCK
The M29W641D has an extra block, the Extended
Block, that can be accessed using a dedicated
command.
This Extended Block is 32 KWords. It is used as a
security block (to provide a permanent security
identification number) or to store additional infor-
mation.
The Extended Block is either Factory Locked or
Customer Lockable, its status is indicated by bit
DQ7. This bit is permanently set to either ‘1’ or ‘0’
at the factory and cannot be changed. When set to
‘1’, it indicates that the device is factory locked and
the Extended Block is protected. When set to ‘0’, it
indicates that the device is customer lockable and
the Extended Block is unprotected. Bit DQ7 being
permanently locked to either ‘1’ or ‘0’ is another
security feature which ensures that a customer
lockable device cannot be used instead of a facto-
ry locked one.
Bit DQ7 is the most significant bit in the Extended
Block Verify Code and a specific procedure must
be followed to read it. See “Extended Memory
Block Verify Code
” in
Table 2, Bus Operations, for
details of how to read bit DQ7.
The Extended Block can only be accessed when
the device is in Extended Block mode. For details
of how the Extended Block mode is entered and
exited, refer to the Enter Extended Block Com-
mand and Exit Extended Block Command para-
graphs, and to Table 3, “Commands”.
Factory Locked Extended Block
In devices where the Extended Block is factory
locked, the Security Identification Number is writ-
ten to the Extended Block address space (see Ta-
ble 24, Extended Block Address and Data) in the
factory. The DQ7 bit is set to ‘1’ and the Extended
Block cannot be unprotected.
Customer Lockable Extended Block
A device where the Extended Block is customer
lockable is delivered with the DQ7 bit set to ‘0’ and
the Extended Block unprotected. It is up to the
customer to program and protect the Extended
Block but care must be taken because the protec-
tion of the Extended Block is not reversible.
There are two ways of protecting the Extended
Block:
I
Issue the Enter Extended Block command to
place the device in Extended Block mode, then
use the In-System Technique (refer to Appendix
D, In-System Technique and to the
corresponding flowcharts, Figures 18 and 19,
for a detailed explanation of the technique).
I
Issue the Enter Extended Block command to
place the device in Extended Block mode, then
use the Programmer Technique (refer to
Appendix D, Programmer Technique and to the
corresponding flowcharts, Figures 16 and 17,
for a detailed explanation of the technique).
Once the Extended Block is programmed and pro-
tected, the Exit Extended Block command must be
issued to exit the Extended Block mode and return
the device to Read mode.
Table 24. Extended Block Address and Data
Note: 1. See Table 17, Block Addresses.
Device
Address
(1)
Data
x16
Factory Locked
Customer Lockable
M29W641D
000000h-000007h
Security Identification Number
Determined by Customer
000008h-007FFFh
Unavailable
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M29W641DU70ZA6E | 64 Mbit 4Mb x16, Uniform Block 3V Supply Flash Memory |
| M29W641DH90ZA6E | 64 Mbit 4Mb x16, Uniform Block 3V Supply Flash Memory |
| M29W641DH12ZA1E | Shielded Multiconductor Cable; Number of Conductors:10; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper RoHS Compliant: Yes |
| M29W641DL12ZA1E | Shielded Multiconductor Cable; Number of Conductors:10; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Shielding Material:Aluminum Foil/Polyester Tape/Tinned Copper Braid RoHS Compliant: Yes |
| M29W641DU12ZA1E | Shielded Multiconductor Cable; Number of Conductors:15; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M29W641DL90N6 | 功能描述:閃存 64M (4Mx16) 90ns RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結(jié)構(gòu):256 K x 8 定時類型: 接口類型:SPI 訪問時間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| M29W641DU90ZA6 | 功能描述:閃存 64M (4Mx16) 90ns RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結(jié)構(gòu):256 K x 8 定時類型: 接口類型:SPI 訪問時間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| M29W800AB100M1 | 功能描述:閃存 SO-44 1MX8 512KX16 RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結(jié)構(gòu):256 K x 8 定時類型: 接口類型:SPI 訪問時間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| M29W800AB100N1 | 功能描述:閃存 1Mx8 or 512Kx16 100n RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結(jié)構(gòu):256 K x 8 定時類型: 接口類型:SPI 訪問時間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| M29W800AB100N6 | 功能描述:閃存 1Mx8 or 512Kx16 100n RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結(jié)構(gòu):256 K x 8 定時類型: 接口類型:SPI 訪問時間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
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