Other Parts Discussed in Thread: TDA2SX, ALP
Hi all,
I am using TDA2Sx with DS90UB933-DS90UB934 pair to communicate with sensor. I am unable to establish connection with Serializer from Deserializer. My hardware team is also looking into this issue. I am suspecting problem in power-up sequence.
In UB933 Serializer Datasheet page#35 8.1.2 Power-Up Requirements and PDB Pin Section it is given that GPO2 should be low when PDB goes high for power-up sequence. But it also says
"If GPO2 state is not determined when PDB goes high, DS90UB933 registers must be programmed to configure the transmission mode. Mode Select register 0x05[5] must be set to 1 and register 0x05 bit 1 and 0 are to be selected based on desired 12-bit or 10-bit transmit data format."
In our case , we see that GPO2 is High (probed with CRO)
I am surprised to see, without power-up sequence and i2c communication, How are we supposed to program the register 0x05.
I am little bit confused, whether did we missed anything?
Looking for support to understand and overcome this problem.
Regards,
ARUNKUMAR V N