A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a decoupling capacitor (e.g., 0.1uF) close to the VCC pin and a ferrite bead or a 10-ohm resistor in series with the HDMI signal lines to reduce EMI.
Use the I2C interface to configure the device. Set the desired resolution and frequency using the registers specified in the datasheet. For example, to set the resolution to 1080p at 60Hz, write 0x01 to register 0x10 and 0x02 to register 0x11. Refer to the datasheet for the complete register map and configuration details.
The TFP401AIPZPRQ1 supports HDMI cable lengths up to 30 meters (98 feet) at 1080p resolution. However, the actual cable length may vary depending on the cable quality, signal frequency, and environmental factors. It's recommended to use high-quality HDMI cables and follow proper cable termination and routing practices to minimize signal degradation.
Use an oscilloscope to measure the HDMI signal quality at the transmitter and receiver ends. Check for signal amplitude, rise time, and jitter. Verify that the HDMI signal is within the specified voltage range (0.5V to 1.2V) and that the clock frequency is within the specified range (25MHz to 340MHz). Also, ensure that the HDMI cable is properly terminated and that there are no signal reflections or crosstalk.
Yes, the TFP401AIPZPRQ1 can be used with an HDMI switch or repeater. However, ensure that the switch or repeater is compatible with the HDMI version (1.4 or 2.0) and resolution supported by the TFP401AIPZPRQ1. Also, verify that the switch or repeater does not degrade the HDMI signal quality or introduce significant latency.
TFP401AIPZPRQ1 datasheet
by Texas Instruments
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