AN4068 datasheet(14/63 Pages) STMICROELECTRONICS

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ST7580 reference design description

AN4068

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Doc ID 022923 Rev 2

ST7580 reference design description

The ST7580 reference design is made up of the following sections:

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ST7580 device section

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Line coupling section, including four subsections:

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Transmission active filter

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Reception passive filter

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Power line coupling

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Zero crossing coupling

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STM32 microcontroller section.

The board has also six external connections:

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AC mains (line and neutral) on CN1 connector;

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VCC (8 to 18 V) and VDDIO (3.3 or 5 V) supply voltages on CN2 connector

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SD storage card on CN3 micro SD connector

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USB interface for PC connectivity on CN4 mini-USB connector

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Digital interface on J2 (5x2 connector), collecting UART and I2C digital access to

the onboard STM32 microcontroller

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JTAG interface for STM32 microcontroller on JTAG1 connector (10x2 connector).

Figure 3.

Board drawing with the various sections indicated

Figure 4 gives a global view of the reference design.

Table 3 lists the components chosen to realize the reference design board. All the parts

have been selected in order to obtain good performance in a real case application.

The layout of the printed circuit board is reported in Figure 44, 45, and 46.

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