SI3482-A01-GM Silicon Laboratories Inc, SI3482-A01-GM Datasheet - Page 9

• Manufacturer Part Number: SI3482-A01-GM
• Description: IC CTLR POE 24-48PORT PSE 24-QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3482-A01-GM

• Applications: Power Over Ethernet Controller
• Current - Supply: 12.1mA
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-WFQFN Exposed Pad
• Product: Power Distribution
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3. Serial Packet Protocol
The Si3482 contains the Power Manager component and the interface to the Power Manager is a collection of
routines known as the Power Manager application programming interface (API).
The Power Manager API is described later in this manual. The host MCU contains a User Interface component,
which calls the routines in the Power Manager API to get status information and configure and control the Power
Manager.
The Serial packet protocol (SPP) is a remote procedure call (RPC) mechanism that allows a User Interface
component to call routines in the Power Manager, even though the User Interface component and the Power
Manager are on different MCUs. The Serial Packet Protocol is implemented by a Serial Packet Client in the host
MCU and the Serial Packet Server in the Si3482.
A Serial Packet Client is a collection of stub routines with the same names and parameters as the routines in the
Power Manager API. A User Interface component calls a stub routine, and the stub routine uses the host interface
to send a packet to the Serial Packet Server. The Serial Packet Client receives a packet back and then returns to
the User Interface component.
The Serial Packet Server receives a packet from a Serial Packet Client and then calls the specified routine in the
Power Manager. When the Power Manager routine returns, the Serial Packet Server sends a packet back to the
Serial Packet Client.
Silicon Labs provides a Serial Packet Client Software Development Kit (SDK) that implements SPP and is portable
to any MCU. The customer only needs to write some small support routines, which map SDK routines to RTOS
routines.
Figure 6. Serial Packet Protocol
Host MCU
Si3482
Si3452
Serial Packet Server
Serial Packet Client
Power Manager
Si3482 Support
User Interface
Rev. 0.1
UART or SPI
I
2
C
Power Manager API
Power Manager API
(Remote Procedure Call)
Serial Packet Protocol
Si3482
9