19_WD90C55.pdf part of Western Digital 19 WD90C55 19_WD90C55.pdf, Western Digital _dataBooks 1992_SystemLogic_Imaging_Storage 19

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WD90C55

TABLE OF CONTENTS

Section Title Page

1.0 INTRODUCTION ............................................................................................................ 1
1. 1 General Description .......................................................................................... 1
1. 2 Features ............................................................................................................ 1
2.0 ARCHITECTURE ............................................................................................................ 2
2. 1 Sequencer - STN Interface ............................................................................... 2
2. 2 Data Conversion Control - STN Interface ......................................................... 2
2. 3 Bi-phase Clock Generator - STN Interface ....................................................... 2
2.4 Power-Down Control ......................................................................................... 2
2.5 I/O Pins Mapping/Pin Scan Test Mode ............................................................. 2
2. 6 TFT Timing Control - TFT Interface .................................................................. 4
2. 7 Color Panel Interface ........................................................................................ 4
2.8 Monochrome LCD Interface .............................................................................. 4
3.0 SIGNAL DESCRIPTION ................................................................................................. 5
3. 1 44-Pin Package ................................................................................................. 5
3. 2 48-Pin Package ............................................................................................... 10
4.0 DC ELECTRICAL SPECiFiCATIONS ........................................................................... 15
4. 1 Absolute Maximum Ratings ............................................................................ 15
4. 2 Standard Test Conditions ............................................................................... 15
4. 3 Supply Pins ..................................................................................................... 15
4. 4 Input Pins ........................................................................................................ 15
4. 5 Output Pins ..................................................................................................... 16
5.0 AC OPERATING CHARACTERiSTiCS ........................................................................ 17
6.0 IMPLEMENTATION ...................................................................................................... 25
7.0 MECHANICAL SPECiFiCATIONS................................................................................ 29
7. 1 44-Pin Package ............................................................................................... 29
7.2 48-Pin Package ............................................................................................... 30

ADVANCED INFORMATION 11/26/91 19-i
WD90C55

LIST OF TABLES

Table Title Page

1-1 Color LCD Implementation ..........................................................................................1
1-2 Color Capability ...........................................................................................................1
3-1 44-Pin Package Pin List ..............................................................................................6
3-2 44-Pin Package Pin Descriptions ................................................................................7
3-3 44-Pin Package SEL[2:0] Bus Definition .....................................................................8
3-4 44-Pin Package LCD Panel Pinout Spec ....................................................................9
3-5 48-Pin Package Pin List ............................................................................................11
3-6 48-Pin Package Pin Descriptions .............................................................................. 12
3-7 48-Pin Package SEL[2:0] Bus Definition ................................................................... 13
3-8 48-Pin Package LCD Panel Pinout Spec .................................................................. 14
5-1 STN Color LCD Mode - Input Timing ........................................................................17
5-2 STN Color LCD Mode - 8-Bit Interface ..................................................................... 19
5-3 STN Color LCD Mode - 8-Bit Interface .....................................................................21
5-4 TFT Color LCD Mode - 9-Bit Interface ......................................................................23

19-ii ADVANCED INFORMATION 11/26/91
WD90C55

LIST OF ILLUSTRATIONS

Figure Title Page

2-1 Color LCD Functional Block Diagram ......................................................................... 3