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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 Name | FPGA Direction | Description | Logic |
---|---|---|---|
SFPx_TX_DISABLE | Output | SFP Enabled / Disabled | Low active |
SFPx_LOS | Input | Loss of receiver signal | High active |
SFPx_RS0 | Output | Full RX bandwidth | Low active |
SFPx_RS1 | Output | Reduced RX bandwidth | Low active |
SFPx_M-DEF0 | Input | Module present / not present | Low active |
SFPx_TX_FAULT | Input | Fault / Normal Operation | High active |
SFPx_SDA | BiDir | 2-wire Serial Interface Data | - |
SFPx_SCL | Output | 2-wire Serial Interface Clock | - |
Note |
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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 Device | I2C Address | Notes | |
---|---|---|---|
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, Si5345A | 1101001 | Level shifted via MAX10 FPGA | |
U4, EEPROM | 10100xx | Last digits determined by carrier board via HPC FMC (C34 GA0, C35 GA1). |
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Note |
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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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