4-Port PoE Manager

Microsemi Proprietary and Confidential. PD69104B1/F Datasheet Revision 2.0

Contents

1 Revision History ............................................................................................................................. 1

1.1 Revision 2.0 ........................................................................................................................................ 1

1.2 Revision 1.5 ........................................................................................................................................ 1

1.3 Revision 1.4 ........................................................................................................................................ 1

1.4 Revision 1.3 ........................................................................................................................................ 1

1.5 Revision 1.2 ........................................................................................................................................ 1

1.6 Revision 1.1 ........................................................................................................................................ 1

1.7 Revision 1.0 ........................................................................................................................................ 1

2 Product Overview .......................................................................................................................... 2

2.1 Features .............................................................................................................................................. 2

2.2 Typical Application ............................................................................................................................. 3

3 Functional Descriptions ................................................................................................................. 4

3.1 Internal Block Diagram ....................................................................................................................... 4

3.2 Logic Main Control Module ................................................................................................................ 4

3.3 Line Detection Generator ................................................................................................................... 4

3.4 Classification Generator ..................................................................................................................... 4

3.5 Current Limiter ................................................................................................................................... 5

3.6 Main MOSFET ..................................................................................................................................... 5

3.7 IC and Port Parameters Monitoring ................................................................................................... 5

3.8 Power-on Reset (PoR) ......................................................................................................................... 5

3.9 Voltage Regulator ............................................................................................................................... 5

3.10 Clock (CLK) ........................................................................................................................................ 5

3.11 I²C Address Selection ........................................................................................................................ 5

3.12 Mode of Operation ........................................................................................................................... 6

3.13 I²C Communication Functional Description ...................................................................................... 6

3.13.1

Address Phase ....................................................................................................................................... 7

3.13.2

Data Phase ............................................................................................................................................. 7

3.14 I²C High-Level Layer .......................................................................................................................... 8

3.14.1

Byte/Word Read/Write Transaction ..................................................................................................... 8

3.14.2

Successive Read/Write Transaction ...................................................................................................... 8

3.14.3

Read Byte Transaction ........................................................................................................................... 8

3.14.4

Broadcast Support ................................................................................................................................. 8

3.14.5

Timeout Mechanism ............................................................................................................................. 8

3.14.6

I²C Timing Constraints ........................................................................................................................... 9

3.15 UART Communication Functional Description ............................................................................... 10

3.15.1

The Physical Layer ............................................................................................................................... 10

3.15.2

Broadcast Support ............................................................................................................................... 11