SNLS589B September 2016 – July 2018 DS90UB960-Q1
RX port specific register. The FPD-Link III Port Select register 0x4C configures which unique Rx port registers can be accessed by I2C read and write commands.
|R/W||0||1: Disable loading of the DATAPATH_CTL registers from the forward channel, keeping locally written values intact.
0: Allow forward channel loading of DATAPATH_CTL registers
|1:0||FC_GPIO_EN||R/W||0x0||Forward Channel GPIO Enable
Configures the number of enabled forward channel GPIOs
00: GPIOs disabled
01: One GPIO
10: Two GPIOs
11: Four GPIOs
This field is normally loaded from the remote serializer. It can be overwritten if the OVERRIDE_FC_CONFIG bit in this register is 1.