參數(shù)資料
型號(hào)： M50FLW040AK5G
廠商： 意法半導(dǎo)體
英文描述： 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
中文描述： 4兆位（5】64字節(jié)塊3】16】4 Kbyte的）3 - V電源供電固件集線器/低引腳數(shù)的閃存
文件頁(yè)數(shù)： 36/64頁(yè)
文件大小： 338K
代理商： M50FLW040AK5G
Firmware hub/low pin count (FWH/LPC) interface Configuration Registers
M50FLW040A,
36/64
6.1.3
Lock Down
The Lock Down Bit provides a mechanism for protecting software data from simple hacking
and malicious attack. When the Lock Down Bit is set, ‘1’, further modification to the Write
Lock, Read Lock and Lock Down Bits cannot be performed. A reset, or power-up, is required
before changes to these bits can be made. When the Lock Down Bit is reset, ‘0’, the Write
Lock, Read Lock and Lock Down Bits can be changed.
Table 15.
1.
In LPC mode, a most significant nibble, F, must be added to the memory address. For all registers, A22=0,
and the remaining address bits should be set according to the rules shown in the ADDR field of
Table 6
to
Table 9
.
Table 16.
Configuration Register map
Mnemonic
Register Name
Memory
Address
Default
Value
Access
Lock Registers (For details, see
Appendix A
)
GPI_REG
Firmware Hub/Low Pin Count (FWH/LPC)
General Purpose Input Register
FBC0100h
N/A
R
MANU_REG
Manufacturer Code Register
FBC0000h
20h
R
Lock Register bit definitions
Bit
Bit Name
Value
Function
(1)
1.
Applies to Top Block Lock Register (T_BLOCK_LK) and Top Block [-1] Lock Register (T_MINUS01_LK) to
Top Block [-7] Lock Register (T_MINUS07_LK).
7-3
Reserved
2
Read-Lock
‘1’
Bus Read operations in this Block always return 00h.
‘0’
Bus read operations in this Block return the Memory Array contents.
(Default value).
1
Lock-Down
‘1’
Changes to the Read-Lock bit and the Write-Lock bit cannot be
performed. Once a ‘1’ is written to the Lock-Down bit it cannot be
cleared to ‘0’; the bit is always reset to ‘0’ following a Reset (using RP
or INIT) or after power-up.
‘0’
Read-Lock and Write-Lock can be changed by writing new values to
them. (Default value).
0
Write-Lock
‘1’
Program and Erase operations in this Block will set an error in the
Status Register. The memory contents will not be changed. (Default
value).
‘0’
Program and Erase operations in this Block are executed and will
modify the Block contents.
相關(guān)PDF資料
PDF描述
M50FLW040AK5P 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
M50FLW040AK5TG 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
M50FLW040AK5TP 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
M50FLW040AN5G 4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M50FLW040AK5P 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
M50FLW040AK5T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory
M50FLW040AK5TG 功能描述:閃存 SERIAL FLASH RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問(wèn)時(shí)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
M50FLW040AK5TP 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4-Mbit (5 】 64 Kbyte blocks + 3 】 16 】 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
M50FLW040AN1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory
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