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AN2744 bảng dữ liệu(PDF) 40 Page - STMicroelectronics

tên linh kiện AN2744
Giải thích chi tiết về linh kiện  ST7538Q power line FSK transceiver
PDF  56 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN2744 bảng dữ liệu(HTML) 40 Page - STMicroelectronics

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Board description
AN2744
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5.6
50-pin connector for communication board
The ST7538Q transceiver requires external digital control to perform communication. This is
done through an ST7 microcontroller which is accommodated on the IBU communication
board (see Section 4).
The communication with the ST7 microcontroller involves several signals, which can be
gathered into 3 groups: digital signals, analog signals and power connections. The signals
for each group are listed in Table 7, Table 8 and Table 9.
Beside the ST7538Q input and output signals, the link to the IBU communication board
includes:
– A 2-bit (B_ID_PLM_1 and B_ID_PLM_0) Board Identification Code, which identifies
the hosted power line transceiver. The "00" HW binary configuration makes the
microcontroller able to recognize the ST7538Q reference design board.
– A VDDF_FORCE signal that forces the microcontroller to refer digital interface levels
to VDDF (VDD) supply voltage provided by the ST7538Q reference design board.
This way both the modem and the microcontroller communicate on the same digital
levels.
Figure 38.
Differential mode disturbances protection
ATOP1
ATOP2
N
P
3
1
2
1
8
4
5
ATOP1
ATOP2
N
P
3
1
2
1
8
4
5



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