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Altera_Forum
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20 years ago

SPI PUZZLE

Hello, all I have problems with SPI as follows. As you know, SPI is a 3 wire interface and a SPI should have 3 signals commonly, but in SOPC Builder, a SPI have 4 signals actully. They a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

TLV320AIC23B datasheet:

Interface can work in SPI or I2C (twowire) mode

in SPI Mode:

SPI Signals are : \CS,SCLK and SDIN

SDIN is input only in SPI Mode

(it seems that register of AIC23 are write only)

so connect MOSI with SDIN