SNLS708 February 2023 DS90UB638-Q1
PRODUCTION DATA
After the device is powered up, the following register settings are required:
The DS90UB638-Q1 can support a single input to Rx port 0. The Receiver port control register RX_PORT_CTL 0x0C (Table 7-29) allows for disabling the Rx input when not in use. These bits can only be written by a local I2C controller at the deserializer side of the FPD-Link.
As an alternative to paging to access FPD-Link III Receive unique port registers, separate I2C addresses may be enabled to allow direct access to the port-specific registers. The Port I2C address registers allow programming a separate 7-bit I2C address to allow access to unique, port-specific registers without paging. I2C commands to these assigned I2C addresses are also allowed access to all shared registers (see Table 7-161).