SNLS589B September 2016 – July 2018 DS90UB960-Q1
The DS90UB960-Q1 includes a second I2C port that allows bidirectional control channel access to both local registers and remote devices. Remote device access is configured on BCCx_MAP register 0x0C[7:4] (Table 33).
The second I2C port uses the same I2C address as the primary I2C port. In addition, RX Port I2C IDs are also available for the second I2C port.
In general, TI recommends that the second I2C port be used in cases where the CSI-2 TX ports are connected to separate processors. The second I2C port allows independent control of the DS90UB960-Q1 as well as remote devices by the second processor. However, Register 0x01 (RESET_CTL) can only be written by the primary I2C port.