SPRUIW7A October 2020 – February 2022
CP Board supports TI ‘s FPD Link III De-serializer IC Mfr. Part# DS90UB926QSQE for recover the audio signals from Tuner interface using HSD connector Mfr. Part# D4S20G-400A5-C. The de-serializer will recover up to eight digital audio channels plus I2C channel across digital link.
This audio signal is connected to McASP1 port of J7200 SoC through 1:3 DEMUX (SN74CBT16214CDGGR). The channel selection is supported by both GPIO expander and EVM configuration DIP switch (SW3).
The I2C1 signals of J7200 being used for controlling of the De-serializer. A 40.2KΩ pull down is provided on ID[X] pin to set the 7‘b I2C address to 0x2C.
Power +12V is provided to the HSD connector using a power switch TPS1H100AQPWPRQ1 to power the FPD Link-III Tuner expansion board. The power switch is controlled by a GPIO expander signal (UB926_PWR_SW_CNTRL).
The mode selection for the de-serializer is shown in Figure 4-34.
The pin out for HSD connector J1 is given in Table 4-21.
Pin No. | Signal |
---|---|
1 | GND |
2 | RIN_N |
3 | POWER (12V) |
4 | RIN_P |