12. Serial Device Communications
12.1 Onboard SPI Support
The MCU onboard the Si5395 EVB communicates with the Si5395 device through a 4-wire SPI (Serial Peripheral Interface) link. The
MCU is the SPI master and the Si5395 device is the SPI slave. The Si5395 device can also support a 2-wire I
2
C serial interface, al-
though the Si5395 EVB does NOT support the I
2
C mode of operation. SPI mode was chosen for the EVB because of the relatively
higher speed transfers supported by SPI vs. I
2
C.
UG335: Si5395 Evaluation Board User's Guide
Serial Device Communications
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