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M50FLW040A 데이터시트(PDF) 37 Page - STMicroelectronics

부품명 M50FLW040A
상세설명  4-Mbit (5 횞 64 Kbyte blocks 3 횞 16 횞 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory
PDF  64 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M50FLW040A 데이터시트(HTML) 37 Page - STMicroelectronics

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M50FLW040A, M50FLW040BFirmware hub/low pin count (FWH/LPC) interface Configuration Reg-
37/64
6.2
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.
6.3
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.
Table 17.
General-Purpose Input Register definition
Bit
Bit Name
Value
Function(1)
1.
Applies to the General Purpose Inputs Register (GPI-REG).
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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