DirecTV DTV-MD0-0058 用户手册

   

DIRECTV Set-top box information for the installer

 

DIRECTV Proprietary 

 

November 17, 2005 

Version 1.1.a 

Page 15 of 49 

DTV-MD-0058 

Start

Reset Command 

Parser

(Parser is free)

*Command 

Prefix (0xFA)?

Send

STB Response

= NACK_PREFIX

NO

**Command Parser 

attaches to current 

data port

(Parser is in use)

*Known 

Command?

Send

STB Response

= NACK_CMD

YES

NO

*2 Byte 

Command?

Read 2

nd

 Byte of a 2 

Byte Command

*Known 

Command?

Send

STB Response

= ACK_CMD

YES

NO

YES

YES

NO

A

A

Send

STB Response

= ACK_RESET

Send

STB Response

= DATA_ERROR

Send

STB Response

= CMDBUF_OVFL

Input 

Parameters?

*Correct # of 

Input 

Parameters?

Send

STB Response

= NACK_PARAMS

Send

STB Response

= ACK_PARAMS

Execute Command 

and send Return 

Data Stream as 

appropriate

(Parser is Busy)

Command 
completed 

successfully ?

Send

STB Response

= NACK_FCNOK

Send

STB Response

= ACK_FCNOK

(Parser is not busy)

YES

YES

NO

NO

YES

NO