PD69108/F

Copyright © 2013

Microsemi

Rev. 1.6

Analog Mixed Signal Group

1 Enterprise, Aliso Viejo, CA 92656, USA; Within the USA: (800) 713-4113, Outside the USA: (949) 221-7100 Fax: (949) 756-0308

12

TM

®

PD69108 Internal Block Diagram

The PD69108 is based on two major sections:



A Digital section which controls and monitors the logical PoE functions (state machines, timings etc.)



An Analog section which performs the Front End analog PoE functionality.

Figure 1 illustrates both functions.

PORT 8 Tool Box

PORT 7 Tool Box

PORT 6 Tool Box

PORT 5 Tool Box

PORT 4 Tool Box

PORT 3 Toool Box

PORT 2 Tool Box

CLK

A/D

Voltage

Regulator

Analog

Mesurment

Thermal

Protection

Controlled

Reference

Voltage

Generator for

Line Detection

& Classification

Current Limiter

AGND

Vmain

POR

Sense Resistor

Main MOSFET

SPI

(

SPI Control,

Watch Dog)

CRG

(CPU/Control

Registers)

MSC

(Miscellaneous ,

Power bank,

General counter,

IC ctrl)

sck

cs_n

mosi

miso

PG[3:0]

sync

sync

sync

VCM

(Voltage Current

Measurement)

ADC

Full

RTP

AIR

(Analog

Interface)

ADDR[3:0]

Reg

Table

DGND

Digital

Analog

Figure 1: PD69108 Internal Block Diagram