Microchip PD77728 Manual

Microchip Ikke kategoriseret PD77728

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User Guide

DS00004761B - 1

Introducon

This document describes the PD77728 register map and register functionality. The PD77728 communication

method is based on I

C, using register access as shown in Figure 1. Each PD77728 includes two consecutive I

addresses (a single I

C address controls 4 ports of 2 pairs). The two I

C addresses are set by pins A1–A4, and

each address is 7 bits. The PD77728 device does not require clock stretch support from the host. See the I

section in the PD77728 Datasheet to program the I

C address.

Figure 1. I

C Transacons

PD77728 Auto Mode Register Map

User Guide

DS00004761B - 2

Table of Contents

Introduction...........................................................................................................................................................................1

1. Automode Operational Flowchart...............................................................................................................................3

2. Register Map.................................................................................................................................................................. 4

3. Register Functionality................................................................................................................................................... 7

3.1. Event Registers (0x00 to 0x0B)......................................................................................................................... 7

3.2. Status Registers (0x0C to 0x11)........................................................................................................................ 9

3.3. Conguration Registers (0x12 to 0x19 and 0x27/0x28).............................................................................. 11

3.4. General Registers (0x1B and 0x1C)................................................................................................................12

3.5. Specialized Registers (0x24 to 0x2F)..............................................................................................................12

3.6. Port Voltage and Current Measurement Registers (0x30 to 0x3F)............................................................ 14

3.7. Port Inrush Current Control Register (0x40).................................................................................................15

3.8. Firmware Version and Chip ID Registers (0x41 and 0x43)..........................................................................15

3.9. Port Signature Measurement Registers (0x44 to 0x4B).............................................................................. 15

3.10. Port Classication Status Registers (0x4C to 0x4F)......................................................................................16

3.11. AutoClass Status Registers (0x51 to 0x54)....................................................................................................17

4. Revision History...........................................................................................................................................................18

Microchip Information....................................................................................................................................................... 19

The Microchip Website............................................................................................................................................... 19

Product Change Notication Service........................................................................................................................ 19

Customer Support.......................................................................................................................................................19

Microchip Devices Code Protection Feature............................................................................................................ 19

Legal Notice..................................................................................................................................................................19

Trademarks.................................................................................................................................................................. 20

Quality Management System.....................................................................................................................................21

Worldwide Sales and Service..................................................................................................................................... 22