Table of Contents
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Table of Contents
Section
1
Introduction ............................................................................................................................. 6
1.1
Disclaimer...................................................................................................................................... 6
1.2
Scope .............................................................................................................................................. 6
1.3
Feedback........................................................................................................................................ 6
2
Set-top box Front Panel Shortcut Keys .................................................................................. 7
3
Data Port Connectors.............................................................................................................. 8
3.1
Low-Speed Data Port Connector ................................................................................................ 8
3.2
Low-Speed Data Port Interface................................................................................................... 9
3.3
Low-Speed Electrical Performance and Characteristics ........................................................ 10
3.4
Bit Timing (Start, -D0 TO -D7, and Stop) .............................................................................. 10
3.5
Idle Interval, General................................................................................................................. 10
3.6
Idle Interval for Non-Empty STB Buffer ................................................................................. 10
3.7
Low-Speed Input Characteristics.............................................................................................. 11
3.7.1
Input Signaling Characteristics (Pin 3)..................................................................... 11
3.8
Low-Speed Output Characteristics........................................................................................... 11
3.8.1
Output Drive Characteristics (Pin 2) ........................................................................ 11
3.8.2
Passive Outputs (Pins 1, 6, 8, and 9) (Optional)....................................................... 11
3.8.3
Low-Speed Signaling Conventions .......................................................................... 12
3.9
USB 2.0 Data Ports ..................................................................................................................... 12
4
Data Port Commands ............................................................................................................ 13
4.1
Summary of Useful Data Port Commands............................................................................... 13
4.2
Default Data Rate and Format.................................................................................................. 13
4.3
Command Protocol..................................................................................................................... 14
4.4
STB Command Prefix ................................................................................................................ 16
4.5
STB Responses ............................................................................................................................ 16
5
Data Port Command Details ................................................................................................. 17
5.1
Standby (0x81) ............................................................................................................................ 17
5.2
Active (0x82) ............................................................................................................................... 17
5.3
GetPrimaryStatus (0x83) ........................................................................................................... 18
DIRECTV Proprietary
Version 1.1.a
Page 3 of 49
Page
November 17, 2005
DTV-MD-0058
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