參數(shù)資料
型號: M50FLW080AN5T
廠商: STMICROELECTRONICS
元件分類: PROM
英文描述: 1M X 8 FLASH 3V PROM, 11 ns, PDSO40
封裝: 10 X 20 MM, PLASTIC, TSOP-40
文件頁數(shù): 18/53頁
文件大?。?/td> 945K
代理商: M50FLW080AN5T
25/53
M50FLW080A, M50FLW080B
Table 16. Lock Register Bit Definitions
Note: 1. Applies to the registers that are defined in Table 34. and Table 35..
Table 17. General Purpose Inputs Register Definition
Note: 1. Applies to the General Purpose Inputs Register (GPI-REG).
Firmware Hub/Low Pin Count (FWH/LPC)
General Purpose Input Register
The FWH/LPC General Purpose Input Register
holds the state of the General Purpose Input pins,
GPI0-GPI4. When this register is read, the state of
these pins is returned. This register is read-only.
Writing to it has no effect.
The signals on the FWH/LPC Interface General
Purpose Input pins should remain constant
throughout the whole Bus Read cycle.
Manufacturer Code Register
Reading the Manufacturer Code Register returns
the value 20h, which is the Manufacturer Code for
STMicroelectronics. This register is read-only.
Writing to it has no effect.
Bit
Bit Name
Value
Function (1)
7-3
Reserved
2
Read-Lock
‘1’
Bus Read operations in this Block or Sector always return 00h.
‘0’
Bus read operations in this Block or Sector 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).
0Write-Lock
‘1’
Program and Erase operations in this Block or Sector 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 or Sector are executed and will modify
the Block or Sector contents.
Bit
Bit Name
Value
Function (1)
7-5
Reserved
4GPI4
‘1’
Input Pin GPI4 is at VIH
‘0’
Input Pin GPI4 is at VIL
3GPI3
‘1’
Input Pin GPI3 is at VIH
‘0’
Input Pin GPI3 is at VIL
2GPI2
‘1’
Input Pin GPI2 is at VIH
‘0’
Input Pin GPI2 is at VIL
1GPI1
‘1’
Input Pin GPI1 is at VIH
‘0’
Input Pin GPI1 is at VIL
0GPI0
‘1’
Input Pin GPI0 is at VIH
‘0’
Input Pin GPI0 is at VIL
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