PPC7A Product Manual
Functional Description
8-18
Software Programmable LEDs
Control register 0x820 provides four signals, which are connected to four of the LEDs. There is a
separate control bit for each LED. Three are visible in the front panel (DS1/2/3) and also on the back of
the board as DS12/13/14, together with DS11.
The other 8 LEDs are all surface mounted on the back of the PCB.
DS16, DS17, DS18, and DS19 are Ethernet status LEDs for channel 1, and DS20, DS21, DS22, and
DS23 are for channel 2. The default functions of these LEDs are link, TX activity, RX activity status,
and 100BaseT respectively, but these may be overridden by the software.
The PPC7A
has the following software programmable LEDs:
Figure 8.3 – Position of LEDs (Back of the Board)
1
st
Edition
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