28953-SWG-001-A Datasheet, PDF (124/183 Pages) M/A-COM Technology Solutions, Inc. – Application and Channel Unit Software

8.0 API Command Set
8.3 Application Examples
RS8953B
Application and Channel Unit Software Developer’s Guide
8.3.2.8 Step 8: Read the B Data Register
To read the byte at the byte location issue the EOC Read Register API command.
0xF9–DSL_CHANNEL0.
0x87–EOC Read Data Register.
0x0B–0 is for write B is Register B.
The return value is 0xAA.
8.3.3 HTU-C CRC Check Command Example
Example steps 1 and 2 explain how to test the HTU-C CRC detector.
8.3.3.1 Step 1: HTU-C Receives Corrupted CRC from HTU-R.
To verify the HTU-C CRC detector unit is functioning, the HTU-C requests that the HTU-R send
corrupted CRC-6 errors.
0xF9–DSL_CHANNEL0.
0x3A–Set EOC Control Commands.
0x20–Request corrupted CRC-6 from the HTU-R.
This command sends corrupted CRC-6 every multi-frame until the End of Corrupted CRC-6
command (0x28) is sent. (See the ETSI TS 152 Edition 4 under HDSL EOC opcode messages for
more information.)
The user monitors the HTU-Cs CRC-6 errors counter to verify CRC detector functionality.
8.3.3.2 Step 2: Set the End Corrupted CRC Command
To disable the HTU-R sending corrupted CRC-6 issue the following values.
0xF9–DSL_CHANNEL0.
0x3A–Set EOC Control Commands.
0x28–Request End of Corrupted CRC-6 from the HTU-R.
Stops the HTU-R from sending corrupted CRC-6.
8.3.4 HTU-R CRC Check Command Example
The example steps 1 and 2 explain how to test the HTU-R CRC detector.
8.3.4.1 Step 1: Notify the HTU-R of Corrupted CRC
The HTU-C can notify the HTU-R that it will be sending CRC-6 errors. This will be used in the
HTU-R to disable alarm indication circuitry activated by the detection of corrupted CRC-6.
0xF9–DSL_CHANNEL0.
0x3A–Set EOC Control Commands.
0x3F–Notify HTU-R the HTU-C will send corrupted CRC-6, disable any alarms.
8-34
Conexant
100418C