There are several I2C interfaces on the XCSU35P FPGA that connect to devices on the SCU35 board:
| I2C Interface | Purpose | Ref Des | I2C Address |
|---|---|---|---|
| SySMon | System Monitor | J4 | 0x## 1 |
| I2C0 | EEPROM | U17 | 0x50 & 0x58 |
| I2C1 | Power telemetry | U61 | 0x44 |
| I2C1 | Power telemetry | U64 | 0x45 |
| I2C2 | USB-C PD | U34 | 0x20 |
| I2C3 | Accelerometer | U18 | 0x18 |
| I2C4 | HSIO | J21 | 0x32 |
|
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The following figure shows the I2C bus connectivity detailed in the table above. Discrete I2C interfaces on the FPGA eliminate the need for I2C multiplexers on the board and provide great flexibility to include only those interfaces in the FPGA design that are required for the user application.
Figure 1. I2C Bus Connectivity
The detailed FPGA connections for the feature described in this section are documented in the SCU35 evaluation board schematic and XDC file.