SI3482-A01-GMR Silicon Labs, SI3482-A01-GMR Datasheet - Page 25

• Manufacturer Part Number: SI3482-A01-GMR
• Description: Power Switch ICs - POE / LAN 12/24/48-port Power Manager
• Manufacturer: Silicon Labs

Specifications of SI3482-A01-GMR

• Rohs: yes

4.6.9. SetRetryPolicy
Set the retry policy.
Prototype:
Parameters:
Return Value:
Table 16 lists the Retry policy values.
The retry policy specifies when the Power Manager tries again to power a port that is turned off because of a port
overload. A port overload is when the power consumed by a PD is greater than the power granted to that PD. If the
retry policy is “immediate”, the Power Manager tries to turn the port back on immediately.
If the retry policy is “reconnect”, the Power Manager waits until the PD is disconnected and then reconnected
before it tries again to power the port. The Power Manager must detect an open circuit on the port before retrying.
If the retry policy is “reenable”, the Power Manager disables the port when a port overload occurs. The user must
reenable the port before the Power Manager tries to power the port again.
4.6.10. GetRetryPolicy
Get the retry policy.
Prototype:
Parameters:
Return Value:
4.6.11. SetPowerLocation
Set the location of the power source.
Prototype:
Parameters:
Return Value:
Table 17 lists the Location values.
If the power source is within an Ethernet switch, the location is an “endpoint”. If the power source is inserted
between an Ethernet switch and a PD, the location is a “midspan”. The Power Manager uses different back-off
timings for different locations. The Power Manager assumes that an endpoint device uses the Alternative A pinout
and that a midspan device uses the Alternative B pinout.
INT8 SetRetryPolicy ( INT8 RetryPolicy )
RetryPolicy
Zero (for success) or an error code.
INT8 SetPowerLocation ( INT8 Location )
Location
Zero (for success) or an error code.
INT8 GetRetryPolicy ( void )
None
The retry policy value.
Retry Policy
Location
Endpoint
Reconnect
Immediate
Midspan
Reenable
Where the power source is located.
Table 17. Power Location Values
When to retry after a port overload.
Table 16. Retry Policy Values
Value
Value
Rev. 0.1
0
1
0
1
2
RETRY_AFTER_RECONNECT
RETRY_AFTER_REENABLE
RETRY_IMMEDIATELY
LOCATION_ENDPOINT
LOCATION_MIDSPAN
Symbol
Symbol
Si3482
25