SPRUJ53C April 2024 – February 2025 TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SG-Q1 , TMS320F28P559SJ-Q1
Figure 27-1 shows the block diagram for PMBus. The PMBus module handles the lower levels of the PMBus protocol. In addition to controlling signal levels and timing, parsing addresses, and buffering data, the PMBus module also directly supports complex transactions such as Read Word and Process Call.
There are four PMBus signals:
The SDA and SCL timings produced by the module are derived from SYSCLK. To comply with the PMBus timing specs, the bit clock divider must be set by way of the PMBTIMCLK register to provide a bit clock with respect to the module's configured speed.
Figure 27-1 PMBus Module Block
Diagram