Title here
Summary here
Pin Configuration
Pinout table
The 2x QSFP28 FMC has a high pin count FPGA Mezzanine Card (FMC) connector, providing the connections to the FPGA on the development board. The following table defines the pinout of the FMC connector and describes each pin’s purpose on this mezzanine card.
| Pin | Pin name | Net | Description |
|---|---|---|---|
| A1 | GND | GND | Ground |
| A2 | DP1_M2C_P | DP1_M2C_P | Port 0 QSFP28 RX lane 1 positive |
| A3 | DP1_M2C_N | DP1_M2C_N | Port 0 QSFP28 RX lane 1 negative |
| A4 | GND | GND | Ground |
| A5 | GND | GND | Ground |
| A6 | DP2_M2C_P | DP2_M2C_P | Port 0 QSFP28 RX lane 2 positive |
| A7 | DP2_M2C_N | DP2_M2C_N | Port 0 QSFP28 RX lane 2 negative |
| A8 | GND | GND | Ground |
| A9 | GND | GND | Ground |
| A10 | DP3_M2C_P | DP3_M2C_P | Port 0 QSFP28 RX lane 3 positive |
| A11 | DP3_M2C_N | DP3_M2C_N | Port 0 QSFP28 RX lane 3 negative |
| A12 | GND | GND | Ground |
| A13 | GND | GND | Ground |
| A14 | DP4_M2C_P | DP4_M2C_P | Port 1 QSFP28 RX lane 0 positive |
| A15 | DP4_M2C_N | DP4_M2C_N | Port 1 QSFP28 RX lane 0 negative |
| A16 | GND | GND | Ground |
| A17 | GND | GND | Ground |
| A18 | DP5_M2C_P | DP5_M2C_P | Port 1 QSFP28 RX lane 1 positive |
| A19 | DP5_M2C_N | DP5_M2C_N | Port 1 QSFP28 RX lane 1 negative |
| A20 | GND | GND | Ground |
| A21 | GND | GND | Ground |
| A22 | DP1_C2M_P | DP1_C2M_P | Port 0 QSFP28 TX lane 1 positive |
| A23 | DP1_C2M_N | DP1_C2M_N | Port 0 QSFP28 TX lane 1 negative |
| A24 | GND | GND | Ground |
| A25 | GND | GND | Ground |
| A26 | DP2_C2M_P | DP2_C2M_P | Port 0 QSFP28 TX lane 2 positive |
| A27 | DP2_C2M_N | DP2_C2M_N | Port 0 QSFP28 TX lane 2 negative |
| A28 | GND | GND | Ground |
| A29 | GND | GND | Ground |
| A30 | DP3_C2M_P | DP3_C2M_P | Port 0 QSFP28 TX lane 3 positive |
| A31 | DP3_C2M_N | DP3_C2M_N | Port 0 QSFP28 TX lane 3 negative |
| A32 | GND | GND | Ground |
| A33 | GND | GND | Ground |
| A34 | DP4_C2M_P | DP4_C2M_P | Port 1 QSFP28 TX lane 0 positive |
| A35 | DP4_C2M_N | DP4_C2M_N | Port 1 QSFP28 TX lane 0 negative |
| A36 | GND | GND | Ground |
| A37 | GND | GND | Ground |
| A38 | DP5_C2M_P | DP5_C2M_P | Port 1 QSFP28 TX lane 1 positive |
| A39 | DP5_C2M_N | DP5_C2M_N | Port 1 QSFP28 TX lane 1 negative |
| A40 | GND | GND | Ground |
| B1 | CLK_DIR | N/C | Not connected |
| B2 | GND | GND | Ground |
| B3 | GND | GND | Ground |
| B4 | DP9_M2C_P | N/C | Not connected |
| B5 | DP9_M2C_N | N/C | Not connected |
| B6 | GND | GND | Ground |
| B7 | GND | GND | Ground |
| B8 | DP8_M2C_P | N/C | Not connected |
| B9 | DP8_M2C_N | N/C | Not connected |
| B10 | GND | GND | Ground |
| B11 | GND | GND | Ground |
| B12 | DP7_M2C_P | DP7_M2C_P | Port 1 QSFP28 RX lane 3 positive |
| B13 | DP7_M2C_N | DP7_M2C_N | Port 1 QSFP28 RX lane 3 negative |
| B14 | GND | GND | Ground |
| B15 | GND | GND | Ground |
| B16 | DP6_M2C_P | DP6_M2C_P | Port 1 QSFP28 RX lane 2 positive |
| B17 | DP6_M2C_N | DP6_M2C_N | Port 1 QSFP28 RX lane 2 negative |
| B18 | GND | GND | Ground |
| B19 | GND | GND | Ground |
| B20 | GBTCLK1_M2C_P | GBTCLK1_M2C_P | Clock oscillator Si5328 CLKOUT2+ output |
| B21 | GBTCLK1_M2C_N | GBTCLK1_M2C_N | Clock oscillator Si5328 CLKOUT2- output |
| B22 | GND | GND | Ground |
| B23 | GND | GND | Ground |
| B24 | DP9_C2M_P | N/C | Not connected |
| B25 | DP9_C2M_N | N/C | Not connected |
| B26 | GND | GND | Ground |
| B27 | GND | GND | Ground |
| B28 | DP8_C2M_P | N/C | Not connected |
| B29 | DP8_C2M_N | N/C | Not connected |
| B30 | GND | GND | Ground |
| B31 | GND | GND | Ground |
| B32 | DP7_C2M_P | DP7_C2M_P | Port 1 QSFP28 TX lane 3 positive |
| B33 | DP7_C2M_N | DP7_C2M_N | Port 1 QSFP28 TX lane 3 negative |
| B34 | GND | GND | Ground |
| B35 | GND | GND | Ground |
| B36 | DP6_C2M_P | DP6_C2M_P | Port 1 QSFP28 TX lane 2 positive |
| B37 | DP6_C2M_N | DP6_C2M_N | Port 1 QSFP28 TX lane 2 negative |
| B38 | GND | GND | Ground |
| B39 | GND | GND | Ground |
| B40 | RES0 | N/C | Not connected |
| C1 | GND | GND | Ground |
| C2 | DP0_C2M_P | DP0_C2M_P | Port 0 QSFP28 TX lane 0 positive |
| C3 | DP0_C2M_N | DP0_C2M_N | Port 0 QSFP28 TX lane 0 negative |
| C4 | GND | GND | Ground |
| C5 | GND | GND | Ground |
| C6 | DP0_M2C_P | DP0_M2C_P | Port 0 QSFP28 RX lane 0 positive |
| C7 | DP0_M2C_N | DP0_M2C_N | Port 0 QSFP28 RX lane 0 negative |
| C8 | GND | GND | Ground |
| C9 | GND | GND | Ground |
| C10 | LA06_P | CLK_LOS_ALARM_T | Clock loss alarm from Si5328 |
| C11 | LA06_N | N/C | Not connected |
| C12 | GND | GND | Ground |
| C13 | GND | GND | Ground |
| C14 | LA10_P | N/C | Not connected |
| C15 | LA10_N | N/C | Not connected |
| C16 | GND | GND | Ground |
| C17 | GND | GND | Ground |
| C18 | LA14_P | N/C | Not connected |
| C19 | LA14_N | N/C | Not connected |
| C20 | GND | GND | Ground |
| C21 | GND | GND | Ground |
| C22 | LA18_P_CC | N/C | Not connected |
| C23 | LA18_N_CC | N/C | Not connected |
| C24 | GND | GND | Ground |
| C25 | GND | GND | Ground |
| C26 | LA27_P | N/C | Not connected |
| C27 | LA27_N | N/C | Not connected |
| C28 | GND | GND | Ground |
| C29 | GND | GND | Ground |
| C30 | SCL | I2C_SCL | I2C Clock |
| C31 | SDA | I2C_SDA | I2C Data (bidirectional) |
| C32 | GND | GND | Ground |
| C33 | GND | GND | Ground |
| C34 | GA0 | GA0 | EEPROM Address Bit 1 (A1) |
| C35 | 12P0V_1 | 12V0 | 12VDC |
| C36 | GND | GND | Ground |
| C37 | 12P0V_2 | 12V0 | 12VDC |
| C38 | GND | GND | Ground |
| C39 | 3P3V_1 | 3V3 | Not connected |
| C40 | GND | GND | Ground |
| D1 | PG_C2M | PG | Power Good (Driven by carrier) |
| D2 | GND | GND | Ground |
| D3 | GND | GND | Ground |
| D4 | GBTCLK0_M2C_P | GBTCLK0_M2C_P | Clock oscillator Si5328 CLKOUT1+ output |
| D5 | GBTCLK0_M2C_N | GBTCLK0_M2C_N | Clock oscillator Si5328 CLKOUT1- output |
| D6 | GND | GND | Ground |
| D7 | GND | GND | Ground |
| D8 | LA01_P_CC | N/C | Not connected |
| D9 | LA01_N_CC | N/C | Not connected |
| D10 | GND | GND | Ground |
| D11 | LA05_P | QSFP1_MODPRSL_T | Port 1 QSFP28 Module Present (active low) |
| D12 | LA05_N | QSFP1_INTL_T | Port 1 QSFP28 Interrupt (active low) |
| D13 | GND | GND | Ground |
| D14 | LA09_P | N/C | Not connected |
| D15 | LA09_N | N/C | Not connected |
| D16 | GND | GND | Ground |
| D17 | LA13_P | N/C | Not connected |
| D18 | LA13_N | N/C | Not connected |
| D19 | GND | GND | Ground |
| D20 | LA17_P_CC | QSFP1_I2C_SCL_T | Port 1 QSFP28 I2C Clock |
| D21 | LA17_N_CC | QSFP1_I2C_SDA_T | Port 1 QSFP28 I2C Data (bidirectional) |
| D22 | GND | GND | Ground |
| D23 | LA23_P | N/C | Not connected |
| D24 | LA23_N | N/C | Not connected |
| D25 | GND | GND | Ground |
| D26 | LA26_P | N/C | Not connected |
| D27 | LA26_N | N/C | Not connected |
| D28 | GND | GND | Ground |
| D29 | TCK | N/C | Not connected |
| D30 | TDI | TDI | Connects to TDO to close JTAG chain |
| D31 | TDO | TDO | Connects to TDI to close JTAG chain |
| D32 | 3P3VAUX | 3V3AUX | 3.3VDC Power supply for EEPROM |
| D33 | TMS | N/C | Not connected |
| D34 | TRST_L | N/C | Not connected |
| D35 | GA1 | GA1 | EEPROM Address Bit 0 (A0) |
| D36 | 3P3V_2 | 3V3 | 3.3VDC main FMC power supply |
| D37 | GND | GND | Ground |
| D38 | 3P3V_3 | 3V3 | 3.3VDC main FMC power supply |
| D39 | GND | GND | Ground |
| D40 | 3P3V_4 | 3V3 | 3.3VDC main FMC power supply |
| E1 | GND | GND | Ground |
| E2 | HA01_P_CC | N/C | Not connected |
| E3 | HA01_N_CC | N/C | Not connected |
| E4 | GND | GND | Ground |
| E5 | GND | GND | Ground |
| E6 | HA05_P | N/C | Not connected |
| E7 | HA05_P | N/C | Not connected |
| E8 | GND | GND | Ground |
| E9 | HA09_P | N/C | Not connected |
| E10 | HA09_P | N/C | Not connected |
| E11 | GND | GND | Ground |
| E12 | HA13_P | N/C | Not connected |
| E13 | HA13_P | N/C | Not connected |
| E14 | GND | GND | Ground |
| E15 | HA16_P | N/C | Not connected |
| E16 | HA16_P | N/C | Not connected |
| E17 | GND | GND | Ground |
| E18 | HA20_P | N/C | Not connected |
| E19 | HA20_P | N/C | Not connected |
| E20 | GND | GND | Ground |
| E21 | HB03_P | N/C | Not connected |
| E22 | HB03_P | N/C | Not connected |
| E23 | GND | GND | Ground |
| E24 | HB05_P | N/C | Not connected |
| E25 | HB05_P | N/C | Not connected |
| E26 | GND | GND | Ground |
| E27 | HB09_P | N/C | Not connected |
| E28 | HB09_P | N/C | Not connected |
| E29 | GND | GND | Ground |
| E30 | HB13_P | N/C | Not connected |
| E31 | HB13_P | N/C | Not connected |
| E32 | GND | GND | Ground |
| E33 | HB19_P | N/C | Not connected |
| E34 | HB19_P | N/C | Not connected |
| E35 | GND | GND | Ground |
| E36 | HB21_P | N/C | Not connected |
| E37 | HB21_P | N/C | Not connected |
| E38 | GND | GND | Ground |
| E39 | VADJ_1 | N/C | Adjustable IO power supply voltage |
| E40 | GND | GND | Ground |
| F1 | PG_M2C | N/C | Not connected |
| F2 | GND | GND | Ground |
| F3 | GND | GND | Ground |
| F4 | HA00_P_CC | N/C | Not connected |
| F5 | HA00_P_CC | N/C | Not connected |
| F6 | GND | GND | Ground |
| F7 | HA04_P | N/C | Not connected |
| F8 | HA04_P | N/C | Not connected |
| F9 | GND | GND | Ground |
| F10 | HA08_P | N/C | Not connected |
| F11 | HA08_P | N/C | Not connected |
| F12 | GND | GND | Ground |
| F13 | HA12_P | N/C | Not connected |
| F14 | HA12_P | N/C | Not connected |
| F15 | GND | GND | Ground |
| F16 | HA15_P | N/C | Not connected |
| F17 | HA15_P | N/C | Not connected |
| F18 | GND | GND | Ground |
| F19 | HA19_P | N/C | Not connected |
| F20 | HA19_P | N/C | Not connected |
| F21 | GND | GND | Ground |
| F22 | HB02_P | N/C | Not connected |
| F23 | HB02_P | N/C | Not connected |
| F24 | GND | GND | Ground |
| F25 | HB04_P | N/C | Not connected |
| F26 | HB04_P | N/C | Not connected |
| F27 | GND | GND | Ground |
| F28 | HB08_P | N/C | Not connected |
| F29 | HB08_P | N/C | Not connected |
| F30 | GND | GND | Ground |
| F31 | HB12_P | N/C | Not connected |
| F32 | HB12_P | N/C | Not connected |
| F33 | GND | GND | Ground |
| F34 | HB16_P | N/C | Not connected |
| F35 | HB16_P | N/C | Not connected |
| F36 | GND | GND | Ground |
| F37 | HB20_P | N/C | Not connected |
| F38 | HB20_P | N/C | Not connected |
| F39 | GND | GND | Ground |
| F40 | VADJ_2 | N/C | Adjustable IO power supply voltage |
| J1 | GND | GND | Ground |
| J2 | CLK3_BIDIR_P | N/C | Not connected |
| J3 | CLK3_BIDIR_P | N/C | Not connected |
| J4 | GND | GND | Ground |
| J5 | GND | GND | Ground |
| J6 | HA03_P | N/C | Not connected |
| J7 | HA03_P | N/C | Not connected |
| J8 | GND | GND | Ground |
| J9 | HA07_P | N/C | Not connected |
| J10 | HA07_P | N/C | Not connected |
| J11 | GND | GND | Ground |
| J12 | HA11_P | N/C | Not connected |
| J13 | HA11_P | N/C | Not connected |
| J14 | GND | GND | Ground |
| J15 | HA14_P | N/C | Not connected |
| J16 | HA14_P | N/C | Not connected |
| J17 | GND | GND | Ground |
| J18 | HA18_P | N/C | Not connected |
| J19 | HA18_P | N/C | Not connected |
| J20 | GND | GND | Ground |
| J21 | HA22_P | N/C | Not connected |
| J22 | HA22_P | N/C | Not connected |
| J23 | GND | GND | Ground |
| J24 | HB01_P | N/C | Not connected |
| J25 | HB01_P | N/C | Not connected |
| J26 | GND | GND | Ground |
| J27 | HB07_P | N/C | Not connected |
| J28 | HB07_P | N/C | Not connected |
| J29 | GND | GND | Ground |
| J30 | HB11_P | N/C | Not connected |
| J31 | HB11_P | N/C | Not connected |
| J32 | GND | GND | Ground |
| J33 | HB15_P | N/C | Not connected |
| J34 | HB15_P | N/C | Not connected |
| J35 | GND | GND | Ground |
| J36 | HB18_P | N/C | Not connected |
| J37 | HB18_P | N/C | Not connected |
| J38 | GND | GND | Ground |
| J39 | VIO_B_M2C_1 | N/C | Not connected |
| J40 | GND | GND | Ground |
| K1 | VREF_B_M2C | N/C | Not connected |
| K2 | GND | GND | Ground |
| K3 | GND | GND | Ground |
| K4 | CLK2_BIDIR_P | N/C | Not connected |
| K5 | CLK2_BIDIR_P | N/C | Not connected |
| K6 | GND | GND | Ground |
| K7 | HA02_P | N/C | Not connected |
| K8 | HA02_P | N/C | Not connected |
| K9 | GND | GND | Ground |
| K10 | HA06_P | N/C | Not connected |
| K11 | HA06_P | N/C | Not connected |
| K12 | GND | GND | Ground |
| K13 | HA10_P | N/C | Not connected |
| K14 | HA10_P | N/C | Not connected |
| K15 | GND | GND | Ground |
| K16 | HA17_P_CC | N/C | Not connected |
| K17 | HA17_P_CC | N/C | Not connected |
| K18 | GND | GND | Ground |
| K19 | HA21_P | N/C | Not connected |
| K20 | HA21_P | N/C | Not connected |
| K21 | GND | GND | Ground |
| K22 | HA23_P | N/C | Not connected |
| K23 | HA23_P | N/C | Not connected |
| K24 | GND | GND | Ground |
| K25 | HB00_P_CC | N/C | Not connected |
| K26 | HB00_P_CC | N/C | Not connected |
| K27 | GND | GND | Ground |
| K28 | HB06_P_CC | N/C | Not connected |
| K29 | HB06_P_CC | N/C | Not connected |
| K30 | GND | GND | Ground |
| K31 | HB10_P | N/C | Not connected |
| K32 | HB10_P | N/C | Not connected |
| K33 | GND | GND | Ground |
| K34 | HB14_P | N/C | Not connected |
| K35 | HB14_P | N/C | Not connected |
| K36 | GND | GND | Ground |
| K37 | HB17_P_CC | N/C | Not connected |
| K38 | HB17_P_CC | N/C | Not connected |
| K39 | GND | GND | Ground |
| K40 | VIO_B_M2C_2 | N/C | Not connected |
| G1 | GND | GND | Ground |
| G2 | CLK1_M2C_P | N/C | Not connected |
| G3 | CLK1_M2C_N | N/C | Not connected |
| G4 | GND | GND | Ground |
| G5 | GND | GND | Ground |
| G6 | LA00_P_CC | REC_CLK1_P | Recovered clock positive (LVDS, FPGA to Si5328) |
| G7 | LA00_N_CC | REC_CLK1_N | Recovered clock negative (LVDS, FPGA to Si5328) |
| G8 | GND | GND | Ground |
| G9 | LA03_P | QSFP0_I2C_SCL_T | Port 0 QSFP28 I2C Clock |
| G10 | LA03_N | QSFP0_I2C_SDA_T | Port 0 QSFP28 I2C Data (bidirectional) |
| G11 | GND | GND | Ground |
| G12 | LA08_P | QSFP1_GRN_LED_T | Port 1 QSFP28 User bicolor LED Green |
| G13 | LA08_N | QSFP1_RED_LED_T | Port 1 QSFP28 User bicolor LED Red |
| G14 | GND | GND | Ground |
| G15 | LA12_P | QSFP0_MODPRSL_T | Port 0 QSFP28 Module Present (active low) |
| G16 | LA12_N | QSFP0_INTL_T | Port 0 QSFP28 Interrupt (active low) |
| G17 | GND | GND | Ground |
| G18 | LA16_P | N/C | Not connected |
| G19 | LA16_N | N/C | Not connected |
| G20 | GND | GND | Ground |
| G21 | LA20_P | N/C | Not connected |
| G22 | LA20_N | N/C | Not connected |
| G23 | GND | GND | Ground |
| G24 | LA22_P | N/C | Not connected |
| G25 | LA22_N | N/C | Not connected |
| G26 | GND | GND | Ground |
| G27 | LA25_P | N/C | Not connected |
| G28 | LA25_N | N/C | Not connected |
| G29 | GND | GND | Ground |
| G30 | LA29_P | N/C | Not connected |
| G31 | LA29_N | N/C | Not connected |
| G32 | GND | GND | Ground |
| G33 | LA31_P | N/C | Not connected |
| G34 | LA31_N | N/C | Not connected |
| G35 | GND | GND | Ground |
| G36 | LA33_P | N/C | Not connected |
| G37 | LA33_N | N/C | Not connected |
| G38 | GND | GND | Ground |
| G39 | VADJ_3 | VADJ | Adjustable IO power supply voltage |
| G40 | GND | GND | Ground |
| H1 | VREF_A_M2C | N/C | Not connected |
| H2 | PRSNT_M2C_L | GND | Ground |
| H3 | GND | GND | Ground |
| H4 | CLK0_M2C_P | N/C | Not connected |
| H5 | CLK0_M2C_N | N/C | Not connected |
| H6 | GND | GND | Ground |
| H7 | LA02_P | CLK_I2C_SCL_T | Clock multiplier I2C bus clock SCL |
| H8 | LA02_N | CLK_I2C_SDA_T | Clock multiplier I2C bus data SDA |
| H9 | GND | GND | Ground |
| H10 | LA04_P | QSFP0_MODSELL_T | Port 0 QSFP28 Module Select (active low) |
| H11 | LA04_N | QSFP0_RESETL_T | Port 0 QSFP28 Reset (active low) |
| H12 | GND | GND | Ground |
| H13 | LA07_P | QSFP0_GRN_LED_T | Port 0 QSFP28 User bicolor LED Green |
| H14 | LA07_N | QSFP0_RED_LED_T | Port 0 QSFP28 User bicolor LED Red |
| H15 | GND | GND | Ground |
| H16 | LA11_P | QSFP0_LPMODE_T | Port 0 QSFP28 Low Power Mode |
| H17 | LA11_N | QSFP1_LPMODE_T | Port 1 QSFP28 Low Power Mode |
| H18 | GND | GND | Ground |
| H19 | LA15_P | QSFP1_MODSELL_T | Port 1 QSFP28 Module Select (active low) |
| H20 | LA15_N | QSFP1_RESETL_T | Port 1 QSFP28 Reset (active low) |
| H21 | GND | GND | Ground |
| H22 | LA19_P | N/C | Not connected |
| H23 | LA19_N | N/C | Not connected |
| H24 | GND | GND | Ground |
| H25 | LA21_P | N/C | Not connected |
| H26 | LA21_N | N/C | Not connected |
| H27 | GND | GND | Ground |
| H28 | LA24_P | N/C | Not connected |
| H29 | LA24_N | N/C | Not connected |
| H30 | GND | GND | Ground |
| H31 | LA28_P | N/C | Not connected |
| H32 | LA28_N | N/C | Not connected |
| H33 | GND | GND | Ground |
| H34 | LA30_P | N/C | Not connected |
| H35 | LA30_N | N/C | Not connected |
| H36 | GND | GND | Ground |
| H37 | LA32_P | N/C | Not connected |
| H38 | LA32_N | N/C | Not connected |
| H39 | GND | GND | Ground |
| H40 | VADJ_4 | VADJ | Adjustable IO power supply voltage |