The controller has a single 32-bit APB programming interface.
The programming interface provides access to the configuration, control, and status registers, as well as data ports for the RX and TX message buffers.
- LPD controllers are attached to the LPD IOP switch
- PMC controller is attached to the PMC IOP switch
APB Interface Clock
The APB interface clock is used by the control and status registers, and the glitch filter.
- PMC_LSBUS_CLK (PMC controller)
- LPD_LSBUS_CLK (both LPD controllers)