Évaluations - 1, GPA: 4
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DIRECTV Proprietary DIRECTV Set-top box information for the installer REVISION HISTORY Revision Date of Issue Author Scope 1.0 September 1, 2005 D. K. Initial version 1.1 October 19, 2005 J. G. Updated formating 1.1.a November 17, 2005 J. G. Fixed 155200 typo and USB 2.0 default data rate in Table 3. Deleted duplicate table of Amplifier codes (Table 17) DIRECTV Proprietary November 17, 2005 Version 1.1.a Page 2 of 49 DTV-MD-0058 DIRECTV Set-top box information for the installer Table of Contents Section Page 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 November 17, 2005 Version 1.1.a Page 3 of 49 DTV-MD-0058 DIRECTV Set-top box information for the installer 5.4 GetCommandVersion (0x84).....................................................................................................20 5.5 GetCurrentChannel (0x87)........................................................................................................20 5.6 GetSignalQuality (0x90).............................................................................................................21 5.7 GetCurrentTime (0x91) ............................................................