Before revision: Host interface connections include: PCI Express -- up to two PCI Express x1 lanes USB -- up to two USB 1.1 or 2.0 channels Serial—one logic-level UART interface SMBus JTAG PCI Express Reset Several auxiliary signals 3V and 5V power and ground Reserved lines (for future enhancements) The balance of the 230-pin FeaturePak socket is allocated to I/O, in two groups: Primary I/O—50 general purpose I/O lines, of which 34 pairs have enhanced isolation Secondary I/O—50 general purpose I/O lines The FeaturePak socket's MXM connector is claimed capable of 2.5 Gbps bandwidth on each pin, thereby supporting high-speed interfaces such as PCI Express, gigabit Ethernet, USB 2.0, among others.
After revision: Host interface connections include: PCI Express -- up to two PCI Express x1 lanes USB -- up to two USB 1.1 or 2.0 channels Serial—one logic-level UART interface SMBus JTAG PCI Express Reset Several auxiliary signals 3V and 5V power and ground Reserved lines (for future enhancements) The balance of the 230-pin FeaturePak socket is allocated to I/O, in two groups: Primary I/O—50 general purpose I/O lines, of which 34 pairs have enhanced isolation Secondary I/O—50 general purpose I/O lines The FeaturePak socket's MXM connector is claimed capable of 2.5 Gbit/s bandwidth on each pin, thereby supporting high-speed interfaces such as PCI Express, gigabit Ethernet, USB 2.0, among others.