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STGAP1AS 数据表(PDF) 45 Page - STMicroelectronics |
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STGAP1AS 数据表(HTML) 45 Page - STMicroelectronics |
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45 / 70 page  DocID029344 Rev 2 45/70 STGAP1AS SPI interface 70 Figure 21. SPI daisy chain connection example In case a bootstrap capacitor and a diode are used to generate the VH supply voltage for the high-side drivers, it is recommended to have one dedicated SD line for all of the high- side drivers and another dedicated SD line for all of the low-side drivers. An example of such topology is shown in Figure 22. Figure 22. SPI daisy chain connection example when bootstrap technique is used for high-side drivers μC MOSI MISO CK Device 1 Device 2 Device N SD SDO CK CS SDI I S O L A T I O N CS SD SD SDO CK CS SDI I S O L A T I O N SD SDO CK CS SDI I S O L A T I O N μC MOSI MISO CK SD SDO CK CS SDI VH VL GNDISO I S O L A T I O N VH_HS1 Cboot_HS1 SD SDO CK CS SDI VH VL GNDISO I S O L A T I O N VH_LS SD SDO CK CS SDI VH VL GNDISO I S O L A T I O N VH_HS2 Cboot_HS2 SD SDO CK CS SDI VH VL GNDISO I S O L A T I O N VH_LS GNDiso GNDiso SD_HS SD_LS CS |
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