1.

Architecture

The following figures shows the simplified hardware and the firmware architecture of the PoE system based on the

PD69200 controller and the PD69208T4, PD69204T4, and PD69208M managers.

Figure 1-1. Simplified Hardware Architecture

PoE Manager

PD69208T4

PD69204T4

PD69208M

PoE Controller

PD69200

Host

Microprocessor

SPI

UART

Figure 1-2. Simplified Firmware Architecture

PoE Manager

PoE Controller

P3.xx Firmware

Supports 802.3bt and PoH

P2.xx Firmware

Supports 802.3af/at and PoH

Host Microprocessor

GUI

Customer

Application

API

System

Services

Serial

Communication

Protocol

• Dark grey boxes indicate Microchip supplied firmware

• Light grey boxes indicate Microchip provided documentation

• White boxes are user supplied

1.1

Firmware

• Firmware is pre-programmed in PD69200 controller. The firmware version is identifiable via the IC ordering part

number.

• Firmware is vendor agnostic with regards to the choice of the host controller.

• The default profiles are coded into the firmware. Microchip offers a configuration tool for profile modification.

1.2

Communication

Communication between the host application and the controller’s firmware may be done via a 15 byte protocol.

Customers may use a Microchip provided API. Microchip provides a Serial Communication Protocol guide.

1.3

GUI

This is a diagnostic tool to control the Microchip PSE emulating or bypassing the host processor.

PD69200

Architecture

Datasheet

DS00003460A-page 4