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On-board I2C devices are connected to the HPC FMC Pin C30 SCL and pin C31 SDA which are reserved for I2C. Level shift and for PLL and SFP+ I²C is done by the FPGA as well as MUX for SFP+MAX10 FPGA for level shift and I²C MUX. Addresses for on-board devices are listed in the table below:
| I2C Device | I2C Address | Notes |
|---|---|---|
| J4, SFP+ | 1100001 / 1100000 | Conventional SFP Memory / Enhanced Feature Set Memory, SFP Device select via MAX10 FPGA implementation. |
| J5, SFP+ | 1100001 / 1100000 | Conventional SFP Memory / Enhanced Feature Set Memory, SFP Device select via MAX10 FPGA implementation. |
| J6, SFP+ | 1100001 / 1100000 | Conventional SFP Memory / Enhanced Feature Set Memory, SFP Device select via MAX10 FPGA implementation. |
| J7, SFP+ | 1100001 / 1100000 | Conventional SFP Memory / Enhanced Feature Set Memory, SFP Device select via MAX10 FPGA implementation. |
| U2, Si5345A | 1101001 | Level shifted via MAX10 FPGA, Device select via MAX10 FPGA implementation. |
| U4, EEPROM | 10100xx | Last digits determined by carrier board via HPC FMC (C34 GA0, C35 GA1).1 |
Table 7: I2C slave device addresses.
On-board Peripherals
1EEPROM FMC SDA and SCL are routed to the FPGA, but this will be removed in future releases due to incompatible power requirments. (The EEPROM required VAUX is not a suitable FPGA Bank supply, currently it is routed to a Bank with conflicting VADJ supply).
On-board Peripherals
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Table 9: Reference clock signals.
EEPROM
A Microchip 24AA025E48 24LC128-I/LC serial EEPROM (U23) contains a globally unique 48-bit node address, which is compatible with EUI-48(TM) specification. The device is organized as two blocks of 128 x 8-bit memory. One of the blocks stores the 48-bit node address and is write protected, the other block is available for application use. It is accessible over I2C bus with slave device address 0x53U4) is provided for IPMI data. It is acceasible via the LPC FMC connector (SCL C30, SDA C31).
On-board
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LED
| LED | Color | Connected to | Description and Notes |
|---|---|---|---|
| D1 | Green | U5-C2 (bank 1A) | Status LED: ... |
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Overview
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