SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
The Alert Response Message (Figure 35-11) is utilized when the master detects an alert condition from a slave on the PMBus. In automatic address acknowledge mode, upon detection of the Alert Response Address, the PMBus module provides an acknowledgment to the master and sends the programmed slave address within the PMBSC register. The module only responds to the message if the Alert En bit within PMBCTRL register has been previously set. After receiving the Alert Response message, the module clears the alert condition and the enable bit within the PMBCTRL register.
In manual address acknowledge mode, the firmware must read the received address from the PMBRXBUF register and transmit the desired slave address back to the master. The PMBCTRL register must be reprogrammed to disable the Alert En bit used to initiate the Alert Response message from the master.