Intel AN430TX Product Specification - Page 17
Super I/O Controller, 1.8.1 Serial Ports, Serial Ports
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Motherboard Description NOTE If you connect an LS-120 drive to an IDE connector and configure it as the "A" drive and configure a standard 3.5-inch floppy as a "B" drive, the standard floppy must be connected to the floppy drive cable's "A" connector (the connector at the end of the cable). 1.8 Super I/O Controller The PC87307VUL Super I/O Controller from National Semiconductor is an ISA Plug and Play compatible (see section 5.1 for compliance level), multifunction I/O device that provides the following features: • Serial ports: Two 16450/16550A-software compatible UARTs Send/receive 16-byte FIFO Four 8-bit DMA options for the UART with Slow Infrared Support (USI) Ring indicator support for both serial ports • Multimode bidirectional parallel port Standard mode, IBM† and Centronics† compatible Enhanced Parallel Port (EPP) mode with BIOS and driver support High-speed Extended Capabilities Port (ECP) mode • Floppy disk controller DP8473 and N82077 compatible 16 byte FIFO PS/2† diagnostic register support CMOS disk input and output logic High performance digital data separator (DDS) PC-AT† and PS/2 drive mode support • Keyboard and mouse controller Industry standard 8042A compatible General purpose microcontroller 8 bit internal data bus • Support for an IrDA and Consumer IR-compliant infrared interface By default, the I/O controller interfaces are automatically configured during boot up. The I/O controller can also be manually configured in the Setup program. 1.8.1 Serial Ports The motherboard has one 9-pin D-Sub serial port connector located on the back panel, and one keyed 10-pin header located on the motherboard for cabling to the back panel. The 16540 and 16550A compatible UARTs support data transfers at speeds up to 921.6 Kbits/sec, while the extended UART mode supports data rates up to 1.5 Mbits/sec. 17
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