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| 型号： | M50FW040K5TG |
| 厂商： | 意法半导体 |
| 英文描述： | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| 中文描述： | 4兆位（512 KB的× 8，均匀块）3 - V电源供电的闪存固件枢纽 |
| 文件页数： | 30/53页 |
| 文件大小： | 278K |
| 代理商： | M50FW040K5TG |
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Firmware hub (FWH) interface Configuration Registers
M50FW040
30/53
6
Firmware hub (FWH) interface Configuration
Registers
When the Firmware Hub Interface is selected several additional registers can be accessed.
These registers control the protection status of the Blocks, read the General Purpose Input
pins and identify the memory using the Electronic Signature codes. See
Table 9
for the
memory map of the Configuration Registers.
6.1
Lock Registers
The Lock Registers control the protection status of the Blocks. Each Block has its own Lock
Register. Three bits within each Lock Register control the protection of each block, the Write
Lock Bit, the Read Lock Bit and the Lock Down Bit.
The Lock Registers can be read and written, though care should be taken when writing as,
once the Lock Down Bit is set, ‘1’, further modifications to the Lock Register cannot be made
until cleared, to ‘0’, by a reset or power-up.
See
Table 10
for details on the bit definitions of the Lock Registers.
6.1.1
Write Lock
The Write Lock Bit determines whether the contents of the Block can be modified (using the
Program or Erase Command). When the Write Lock Bit is set, ‘1’, the block is write
protected; any operations that attempt to change the data in the block will fail and the Status
Register will report the error. When the Write Lock Bit is reset, ‘0’, the block is not write
protected through the Lock Register and may be modified unless write protected through
some other means.
When V
PP
is less than V
PPLK
all blocks are protected and cannot be modified, regardless of
the state of the Write Lock Bit. If Top Block Lock, TBL, is Low, V
IL
, then the Top Block (Block
7) is write protected and cannot be modified. Similarly, if Write Protect, WP, is Low, V
IL
, then
the Main Blocks (Blocks 0 to 6) are write protected and cannot be modified.
After power-up or reset the Write Lock Bit is always set to ‘1’ (write protected).
6.1.2
Read Lock
The Read Lock bit determines whether the contents of the Block can be read (from Read
mode). When the Read Lock Bit is set, ‘1’, the block is read protected; any operation that
attempts to read the contents of the block will read 00h instead. When the Read Lock Bit is
reset, ‘0’, read operations in the Block return the data programmed into the block as
expected.
After power-up or reset the Read Lock Bit is always reset to ‘0’ (not read protected).
相关PDF资料 |
PDF描述 |
|---|---|
| M50FW040K5TP | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| M50FW040N5G | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| M50FW040N5P | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| M50FW040N5TG | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| M50FW040N5TP | 4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M50FW040K5TP | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:4-Mbit (512 Kb x8, uniform block) 3-V supply firmware hub Flash memory |
| M50FW040N | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:4 Mbit 512Kb x8, Uniform Block 3V Supply Firmware Hub Flash Memory |
| M50FW040N1 | 功能描述:闪存 3.6V 4M (512Kx8) RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| M50FW040N1T | 功能描述:闪存 3.6V 4M (512Kx8) RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| M50FW040N5 | 功能描述:闪存 3.0-3.6V 4M (512Kx8) RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
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