SPRUIW9C October 2021 – March 2024 TMS320F280033 , TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037-Q1 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038-Q1 , TMS320F280038C-Q1 , TMS320F280039 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1
The Alert Response Message (Figure 27-24) is utilized when the master detects an alert condition from a slave. In master mode, the Alert Response Message is simply a Receive Byte message with PEC disabled and the slave address set to 0xC (Alert Response address). The PMBus module detects the alert condition on an input and interrupts the firmware indicating the assertion of an alert condition (slave desires to communicate with the master). Programming the PMBMC register with the Alert Response address initiates the Alert Response message and provides the device address of the slave requesting service. The device address is found in the PMBRXBUF register following receipt of the EOM interrupt.