4-Port PoE Manager

Microsemi Proprietary and Confidential. PD69104B1/F Datasheet Revision 2.0

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Functional Descriptions

The following sections describe the functions of the PD69104B1/F device.

3.1

Internal Block Diagram

The following illustration shows the internal block diagram for the PD69104B1/F device.

Figure 2 • Internal Block Diagram

3.2

Logic Main Control Module

The logic main control block includes the digital timing mechanisms and the state machines,

synchronizing and activating the following PoE functions.

Real-time protection (RTP)

Start-up macro (DVDT)

Load-signature detection (RES DET)

Classification macro (CLASS)

Voltage and current monitoring registers (VMC)

ADC interfacing

Direct digital signals with analog block

3.3

Line Detection Generator

Upon request from the main control module, the line detection generator creates four different voltage

levels. Thus, it ensures robust AF/AT line detection functionality.

3.4

Classification Generator

Upon request from the main control module, the state machine applies regulated class event and mark

event voltages to the ports, as required by the IEEE standard.