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VSC7440 Datasheet(PDF) 423 Page - Microsemi Corporation |
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VSC7440 Datasheet(HTML) 423 Page - Microsemi Corporation |
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423 / 444 page  Pin Descriptions VMDS-10492 VSC7440 Datasheet Revision 4.2 406 7.2.5 Miscellaneous The following table lists the pins associated with a particular interface or facility on the device. 7.2.6 PCI Express Interface The following table lists the pins associated with PCI Express (PCIe). 7.2.7 Power Supplies and Ground The following table lists the power supply and ground pins. Table 329 • Miscellaneous Pins Name I/O Type Level Description nRESET I 3V CMOS Global device reset, active low. REF_FILT ABIAS Analog Copper media reference filter pin. Connect a 1.0 µF external capacitor between pin and ground. REF_Rext ABIAS Analog Copper media reference external pin. Connect a 2.0 k Ω (1%) resistor between pin and ground. RESERVED_0 RESERVED_1 Analog Analog Leave floating or connect to test point. RESERVED_2 O SSTL Leave floating. RESERVED_3 RESERVED_4 Analog Analog Tie to VSS. SERDES_Rext_[1:0] Analog Analog Analog bias calibration. Connect an external 620 Ω ±1% resistor between SERDES_Rext_1 and SERDES_Rext_0. THERMDA Analog Analog Thermal diode anode (p-junction). THERMDC Analog Analog Thermal diode cathode (n-junction). Connected on-die to VSS. Table 330 • PCI Express Interface Pins Name I/O Type Level Description PCIE_RXN PCIE_RXP I DIFF, TD CML Differential PCIe data inputs. PCIE_TXN PCIE_TXP O DIFF CML Differential PCIe data outputs. Table 331 • Power Supply and Ground Pins Name Type Description VDD_[32:1] Power 1.0 V power supply voltage for core VDD_A_[9:1] Power 1.0 V power supply voltage for analog circuits VDD_AH_[4:1] Power 2.5 V power supply for copper PHY interface VDD_AL_[4:1] Power 1.0 V power supply for copper PHY analog circuits VDD_HS_[5:1] Power 1.0 V or 1.2 V power supply for SERDES10G VDD_IO_[8:1] Power 2.5 V power supply for GPIO and miscellaneous I/Os VDD_IODDR_[5:1] Power 1.35 V or 1.5 V power supply for DDR3/DDR3L interface |
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