W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 2

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

TABLE OF CONTENTS
REVISION HISTORY.............................................................................................................................. 7
1. GENERAL DESCRIPTION................................................................................................................. 8
2. FEATURES......................................................................................................................................... 9
3. PIN CONFIGURATIONS .................................................................................................................. 10
4. PIN DESCRIPTION .......................................................................................................................... 13
5. SYSTEM DIAGRAM AND APPLICATIONS..................................................................................... 16
6. BLOCK DIAGRAM ........................................................................................................................... 18
7. FUNCTIONAL DESCRIPTIONS....................................................................................................... 19
8 REGISTER DESRCRIPTIONS.......................................................................................................... 53
7.3 B Channel Switching ........................................................................................................................ 41
7.4 PCM Port .......................................................................................................................................... 42
7.5 D Channel HDLC Controller ............................................................................................................. 42
7.6 GCI Mode Serial Interface Bus ......................................................................................................... 47
7.7 8-bit Microprocessor Interface ........................................................................................................ 52
8.1 D Channel HDLC Controller Register Address Map......................................................................... 53
8.2 GCI Bus Control Register Address Map ........................................................................................... 54
8.3 Miscellaneous Register Address Map .............................................................................................. 55
8.4 D Channel HDLC Controller Register Memory Map ......................................................................... 55
7.1.1 Main Block Functions ......................................................................................................................19
7.1.2 Interface and Operating Modes .......................................................................................................20
7.2.1 S/T Interface Transmitter/Receiver..................................................................................................20
7.2.2 Receiver Clock Recovery And Timing Generation ..........................................................................25
7.2.3 Layer 1 Activation/Deactivation .......................................................................................................26
7.2.4 Layer 1 Activation /Deactivation in LT-S Mode................................................................................32
7.2.5 D Channel Access Control ..............................................................................................................35
7.2.6 Frame Alignment .............................................................................................................................36
7.2.7Multiframe Synchronization ..............................................................................................................38
7.2.8Test Functions ..................................................................................................................................40
7.5.1 D Channel Message Transfer Modes ..............................................................................................44
7.5.2 Reception of Frames in D Channel .................................................................................................45
7.5.3 Transmission of Frames in D Channel ............................................................................................46
7.6.1 GCI Mode C/I Channel Handling .....................................................................................................49
7.6.2 GCI Mode Monitor Channel Handling..............................................................................................50
2
Preliminary W6691
Publication Release Date: Sep 2001
Revision 1.1