Recently, I am working on a Evaluation board from Xilinx which adopts a PCA9548A chip.
The PCA9548A connected to a processor IIC, the 8 channels of it connect with different devices like eeprom, HDMI codec.
My question is:
For example, assume the PCA9548A 7 bits IIC address is 0x74. Then processor access it and wrote 0b0010_0000 to control register, which enable the 5th channel (0th-7th channel). Assume device which connected to PCA9548A in channel 5, has 7 bits IIC address is 0x39, and it is a HDMI codec. After the PCA9548A channel 5 is enabled, the HDMI codec can be read and write just through IIC address 0x39, right? I mean now the PCA9548A can be seen is "transparent" to HDMI codec. It works as HDMI code c is directly connected to Processor with IIC bus 0x39, do I understand right?
Hope someone can help me confirm this.
Thanks very much.
