FPD Link III serializer IC DS90UB921 is used for converting the 24 bit RGB signals Video signals from SOC into FPD link III signals. The serialized FPD link III output is terminated to HSD connector (Mfr Part# D4S20G-400A5-C). To route the VOUT signals from SOC to FPD link serializer from the default HDMI transmitter, see Table 4-9 and Section 5.2.

I2C signals of J7 SOC being used for controlling and configuring the Display serializer. A 30.9 KΩ Pull up and 95.3K Ω pull down is provided on ID[X] pin to set the 7‘b I2C address to 0x1A.

Power +12 V is provided to the HSD connector using a power switch TPS1H100AQPWPRQ1 to power the FPD Link-III display board. The power switch is controlled by a GPIO expander signal (PWR_SW_UB921). There is an optional clock cleaner circuit Mfr Part#:CDCE813-Q1 is available on infotainment board to clean the input clock signal coming from CP board and pass it to FPD link III Serializer.

Figure 4-12 Optional Clock Cleaner to FPD Link Serializer

Figure 4-13 FPD Link Display Serializer Interface