17
22 Sept 2016
v1.1
2.7
SFP+ Interface – P1 (7015/30 SOM only)
The SFP+ interface is available to the 7015/30 SOM. The non-transceiver portion of the SFP+
interface is routed out to a vertical 0.1” connector (JSFP1). The SFP+ interface can be used
without JSFP1 as long as the SFP+ doesn’t require control signals. If the SFP+ does require
control signals, a loopback cable must be installed into JSFP1 and attached to the JZ PL
PMOD connector. This cable is available from Digilent.
http://store.digilentinc.com/2x6-pin-cable/
•
JP2 is used to enable or disable the SFP+ transmit laser. When the jumper is placed,
the laser is enabled. When the jumper is removed, the laser is disabled unless a low is
written to JSFP1 Pin 2.
•
D13 is the LOS (Loss Of Signal) indicator. It is silkscreened as “LINK” on the board.
This yellow LED will illuminate when a valid SFP+ link is established and maintained. It
will extinguish if there is not a link.
•
NOTE:
The PS_PMOD interface on the PicoZed SOM is, by default, set to eMMC
mode. To select between the PS_PMOD interface and the eMMC interface, please see
the SOM’s User Guide:
http://picozed.org/support/documentation/4736
Figure 8 – SFP+ Interface connections
Figure 9 – SFP+ Control connections
Layout Note:
Place JSFP1 within 3" of PMODs
for loopback purposes.