Hardware, Software, Testing Requirement and Test Result
14
TIDA032 – October 2019
Copyright © 2019, Texas Instruments Incorporated
24-Port (2 pair) Power Sourcing Equipment Reference Design for Multi-port
Applications
1. MSP430 generates the OSS signal
2. CPLD generates the OSS signal
•
Interrupt mask
The interrupt mask in
can be configured to enable interrupt events to notify the host through
the MSP430 P6.0.
Figure 5. GUI System Configuration and PPM Configuration
PPM configuration is applied to the port power management mechanism. The following parameters can be
configured through the PPM configuration tab:
•
Power limit mode:class limit mode and port limit mode
1. Class limit mode:in class limit mode, the port power is limited by the PD's class level. For example,
if the PD is class 8, the port power limit(PCUT) is set to 90W.
2. Port limit mode:in port limit mode, the port power is limited by the host. The host should set port
power limit before the port is powered on.
•
Power policy: static and dynamic mode
1. Static mode:in static mode, the port power allocation is set to port power limit. In class limit mode,
port power allocation is class level power of the PD and in port limit mode, the port power allocation
is the port power limit configured from the host.
2. Dynamic mode: in dynamic mode, the port power allocation equals to the port's actual consumed
power. It allocates the port's unused power to other ports.
•
Multi-power supply mode: RPS and sharing mode:
1. Redundant power supply (RPS) mode:in RPS mode, the total power budget equals to main power
supply's power budget when both main power supply and backup power supply are connected. The
total power budget equals to backup power supply's power budget when the main power supply is
disconnected.
2. Sharing power supply mode:in sharing mode, the total power budget equals to the sum of two
power supplies' power budget when both power supplies are connected. The total power budget
equals to remaining power supply's power budget if one of the power supplies is disconnected.
•
Total number of power supplies and the power budget of each power supply.
If there's only one
power supply, the power good signal must be connected to P1.5.
