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L9780 bảng dữ liệu(PDF) 31 Page - STMicroelectronics

tên linh kiện L9780
Giải thích chi tiết về linh kiện  Wide range air fuel sensor control interface
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L9780 bảng dữ liệu(HTML) 31 Page - STMicroelectronics

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L9780
Digital interface description
55
6
Digital interface description
L9780 contains a serial peripheral interface (SPI) composed by the serial clock (CLK), serial
data out (SO), serial data in (SI), chip select (CSN) and is configured as an SPI slave. If
CSN is asserted and the SPI master continues to issue CLK pulses after the SPI shift
register is filled, the device shall shift the master’s SI data out on SO output.
SPI can support a daisy chain configuration, so the external processor can send SPI
commands to multiple devices without using additional chip select pins, as shown in
Figure 9 and 10.
Figure 9. Daisy chain configuration
Figure 10. SPI transmission in Daisy chain configuration
The first 64 bit data coming out of SO are the output register bits; the subsequent bits are
the SPI commands received through SI pin.



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