SLVSF02D March 2019 – May 2020 TPS23881
The TPS23881 provides port remapping capability, from the logical ports to the physical channels and pins.
The remapping is between any channel of a 4-port group (1 to 4, 5 to 8).
The following example is applicable to 0x26 register = 00111001, 00111001b.
The device ignores any remapping command unless all four ports are in off mode.
If the TPS23881 receives an incorrect configuration, it ignores the incorrect configuration and retains the previous configuration. The ACK is sent as usual at the end of communication. For example, if the same remapping code is received for more than one port, then a read back of the Re-Mapping register (0x26) would be the last valid configuration.
Note that if an IC reset command (1Ah register) is received, the port remapping configuration is kept unchanged. However, if there is a Power-on Reset or if the RESET pin is activated, the Re-Mapping register is reinitialized to a default value.