si3482 Silicon Laboratories, si3482 Datasheet - Page 27

• Manufacturer Part Number: si3482
• Description: Power Management Controller
• Manufacturer: Silicon Laboratories

4.7.4. GetPortCapability
Get if a port can supply high power.
Prototype:
Parameters:
Return Value:
4.7.5. SetPortPriority
Set the priority of a port.
Prototype:
Parameters:
Return Value:
Table 19 lists the Port priority values.
The priority of a port indicates how important it is that the port receives power. If there is not enough power
provided for all ports that want power, then the low priority ports are the first ports to be denied. Critical priority ports
are the last ports to be denied.
If a port is forced on, then the port's priority is elevated to the forced priority level. Forced priority is between high
priority and critical priority and cannot be directly set by the user. When a port is forced on, it may cause a high
priority port to be turned off, but it can never cause a critical priority port to be turned off.
If a severe overload occurs, all of the low priority ports are immediately powered off.
4.7.6. GetPortPriority
Get the priority of a port.
Prototype:
Parameters:
Return Value:
4.7.7. SetPortPowerLimit
Set the power limit of a port.
Prototype:
Parameters:
Return Value:
A power limit restricts the amount of power that may be granted to a port. If a port's power limit is zero, the Power
Manager grants the power requested without restriction. If a port's power limit is greater than zero, the Power
Manager grants the lesser of the power limit or the power requested. If a power request is greater than the power
limit, the Power Manager grants less power than requested.
INT8 GetPortCapability ( UINT8 Port )
Port
Capability value or an error code
INT8 SetPortPriority ( UINT8 Port, INT8 Priority )
Port
Priority
Zero (for success) or an error code
INT8 GetPortPriority ( UINT8 Port )
Port
Priority value or an error code
INT8 SetPortPowerLimit ( UINT8 Port, INT32 Limit )
Port
Limit
Zero (for success) or an error code.
Port Priority
Critical
High
Low
The port number (1–48)
The port number (1–48)
How important it is for the port to be powered.
The port number (1–48)
The port number (1–48)
Maximum power that may be granted in milliwatts.
Table 19. Port Priority Values
Rev. 0.1
Value
0
1
3
PRIORITY_CRITICAL
PRIORITY_HIGH
PRIORITY_LOW
Symbol
Si3482
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