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Table 5: MGT reference clock sources.

SFP+ Control Interface

Follwowing table contains a brief description of the control and status signals of the SFP+ connectors:

Signal Schematic NameFPGA DirectionDescriptionLogic
SFPx_TX_DISABLEOutputSFP Enabled / DisabledLow active
SFPx_LOSInputLoss of receiver signalHigh active
SFPx_RS0OutputFull RX bandwidthLow active
SFPx_RS1OutputReduced RX bandwidthLow active
SFPx_M-DEF0InputModule present / not presentLow active
SFPx_TX_FAULTInputFault / Normal OperationHigh active
SFPx_SDABiDir2-wire Serial Interface Data-
SFPx_SCLOutput 2-wire Serial Interface Clock-


Note

SCL signal is Master driven only, therefore clockstreching is not allowed.

JTAG Interface

JTAG access to the MAX10 FPGA is provided through HPC FMC Connector and an additional pin header connector as well as testpoints.

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I2C DeviceI2C AddressNotes
 J4, SFP+  1100010 SFP Device select via MAX10 FPGA implementation. 
 J5, SFP+ 1100010 SFP Device select via MAX10 FPGA implementation.
 J6, SFP+ 1100010 SFP Device select via MAX10 FPGA implementation.
 J7, SFP+ 1100010 SFP Device select via MAX10 FPGA implementation.
U2, Si5345A1101001Level shifted via MAX10 FPGA
U4, EEPROM10100xxLast digits determined by carrier board via HPC FMC (C34 GA0, C35 GA1).

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Note

Mounting holes near the front pannel are not implemented due to physical restrictions caused by the SFP cage, not implemented. The dimensions exceed in some area the by Vita 57.1 standard defined dimensions. In the middle region of the card the cage is higher than the specified max high for this area. The bottom side is at the high limit.

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