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Original question:

DS90UB953-Q1: Cascaded AWR1243 data serialization for interface to Fusion board and TDA2Px

DS90UB960-Q1: Cascaded AWR1243 data serialization for interface to Fusion board and TDA2Px

Victor Chan2
Prodigy 160 points
Part Number: DS90UB960-Q1
Other Parts Discussed in Thread: AWR1243

I've been looking at the schematic for the Fusion Application Board and would like to know if the SYNC_RADAR signal can be configured to drive towards the AWR1243.  In the schematic (sprr331) it appears to be coming out of the DS90UB960 deserializer (page 8) and connected to J1 (page 14) going to the TDA2px board.  Near J1 the line is labeled SPI1_CS0n which creates confusion.  What is this line actually?  I would like to have four AWR1243s triggered together using the FRAME_SYNC input to them, triggered by the TDA processor.  Is this possible? 

I am using a DS90UB953 serializer which only has 4 GPIO.  I also want to be able to configure the AWR1243's using SPI, but there are not enough GPIO on the 953 for this and for FRAME_SYNC (5 GPIO are needed, plus one more for SPI_HOST_INTR).

Sorry if this post appears twice, it seemed to have failed to post the first time.

Thanks - Victor