2. Using the tool
The bridge is a stand alone device. It has its own alphanumerical display (4 lines of 20
characters) and controls (rotary encoders with push button) for the required parameter
changes.
Most of the bridge configuration is done through SLIMbus (it requires an external Manager
for that).
2.1. Display Pages
The bridge status and configuration is spread over 8 pages, by themes:
• Main page: Signal routing, Port status, presence rate and error reporting
• Page 1: Audio Input Clock
• Page 2: Audio Output Clock
• Page 3: Bus Clock configuration
• Page 4: Framer Status
• Page 5: SLIMbus PHY configuration
• Page 6: Bridge Value Elements
• Page 7: Product Info
The page navigation is simply done by turning left or right the button.
2.1.1. Main Page
This page summarize the important operational information.
I2S >ASRC24>SB>----
P01234567 OPR=n/a
II------ IPR=48k
Framer:Off,RF=1
The first line indicates the digital audio input source (I2S or SPDIF), the signal processing
(
A
synchronous
S
ample
R
ate
C
onverter or Direct) followed by the sample length (in bit)
and the output stream selected for playback on the analogue output and the SPDIF output.
The input source is automatic. The bridge detects if there is a valid stream on the SPDIF
input and switch to it. The automatic input selection only works when there is a SLIMbus
clock present on the bridge and that there are at least 1 data port set as a source. Note
that the SPDIF data are only streamed to the Ports 0 and 1.
When the bridge is powered ON, the first line shows:
----->------>SB>----
When one of the data ports is configured as a source, the first line will show the active
input and the processing that is done on the signal before it is sent on SLIMbus.
SPDIF>ASRC24>SB>----
SPDIF>Direct>SB>----
I2S >ASRC16>SB>----
I2S >Direct>SB>----
SLIMbus Audio Bridge User Manual V0,9 - Draft Version
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