M68HC08 datasheet(193/288 Pages) FREESCALE

193 / 288 page

MC68HC908BD48 — Rev. 2.1

Data Sheet

Freescale Semiconductor

DDC12AB Interface

193

Data Sheet — MC68HC908BD48

Section 15. DDC12AB Interface

15.1 Contents

15.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

15.3

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

15.4

I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

15.5

DDC Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

15.6

Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

15.6.1

DDC Address Register (DADR) . . . . . . . . . . . . . . . . . . . . . 196

15.6.2

DDC2 Address Register (D2ADR) . . . . . . . . . . . . . . . . . . . 197

15.6.3

DDC Control Register (DCR) . . . . . . . . . . . . . . . . . . . . . . . 198

15.6.4

DDC Master Control Register (DMCR) . . . . . . . . . . . . . . . 199

15.6.5

DDC Status Register (DSR) . . . . . . . . . . . . . . . . . . . . . . . . 202

15.6.6

DDC Data Transmit Register (DDTR) . . . . . . . . . . . . . . . . 204

15.6.7

DDC Data Receive Register (DDRR) . . . . . . . . . . . . . . . . . 205

15.7

Programming Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 206

15.2 Introduction

This DDC12AB Interface module is used by the digital monitor to show

its identification information to the video controller. It contains DDC1

hardware and a two-wire, bidirectional serial bus which is fully

compatible with multi-master IIC bus protocol to support DDC2AB

interface.

This module not only can be applied in internal communications, but can

also be used as a typical command reception serial bus for factory setup

and alignment purposes. It also provides the flexibility of hooking

additional devices to an existing system for future expansion without

adding extra hardware.

M68HC08 Datasheet(PDF) 193 Page - Freescale Semiconductor, Inc

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