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    BLACKBOX-IC188C-R2 RS-232 PCI Card, 4-Port, Low-Profile, 16854 UART 4埠RS-232 PCI介面卡, 16854 UART
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    商品編號: BLACKBOX-IC188C-R2

    BLACKBOX-IC188C-R2 RS-232 PCI Card, 4-Port, Low-Profile, 16854 UART 4埠RS-232 PCI介面卡, 16854 UART

    Add ports—and a 460.8-kbps sustained data rate—for serial devices via your PCI bus

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    ★★★★商品說明★★★★

    Description

    RS-232 PCI Card, 4-Port, Low-Profile, 16854 UART


    Quick Facts

  3. Supports all PCI interrupts. You have more IRQs and fewer installation problems!
  4. Universal bus compatible—operates in 5-V or 3.3-V signaling level systems!

    5. 　

    Further Details

  5. Provides up to 4 PCI bus links for communication servers, point-of-sale (POS) systems, and other RS-232 devices.
  6. 16854 UART eliminates data bottlenecks and enables your CPU’s onboard serial ports to achieve 460.8-kbps sustained data rates.
  7. Compatible with all Windows® operating systems (OSs) as well as Linux® and QNX. Includes drivers for Windows diagnostics and other enhanced features.
  8. Includes an ISP port for IRQ sharing.
  9. Features a low profile.
    　

    10. Technical Specifications for RS-232 PCI Card, 4-Port, Low-Profile, 16854 UART:

    Distance (Maximum) — 50 ft. (15.2 m)
    Protocol — Asynchronous
    Speed (Maximum) — 460.8 kbps (sustained)
    CE Approval — Yes
    Connectors — (1) DB37 M on card; (1) DB37 F to (4) DB25 M on included cable

    　


    ★★★★商品規格描述★★★★

    Black Box Explains...UARTs and PCI buses..

    Universal Asynchronous Receiver/Transmitters UARTs are designed to convert sync data from a PC bus to an async format that external I/O devices such as printers or modems use. UARTs insert or remove start bits, stop bits, and parity bits in the data stream as needed by the attached PC or peripheral. They can provide maximum throughput to your high-performance peripherals without slowing down your CPU.

    In the early years of PCs and single-application operating systems, UARTs interfaced directly between the CPU bus and external RS-232 I/O devices. Early UARTs did not contain any type of buffer because PCs only performed one task at a time and both PCs and peripherals were slow.

    With the advent of faster PCs, higher-speed modems, and multitasking operating systems, buffering (RAM or memory) was added so that UARTs could handle more data. The first buffered UART was the 16550 UART, which incorporates a 16-byte FIFO (First In First Out) buffer and can support sustained data-transfer rates up to 115.2 kbps.

    The 16650 UART features a 32-byte FIFO and can handle sustained baud rates of 460.8 kbps. Burst data rates of up to 921.6 kbps have even been achieved in laboratory tests.

    The 16750 UART has a 64-byte FIFO. It also features sustained baud rates of 460.8 kbps but delivers better performance because of its larger buffer.

    Used in newer PCI cards, the 16850 UART has a 128-byte FIFO buffer for each port. It features sustained baud rates of 460.8 kbps.

    The Peripheral Component Interconnect (PCI®) Bus enhances both speed and throughput. PCI Local Bus is a high-performance bus that provides a processor-independent data path between the CPU and high-speed peripherals. PCI is a robust interconnect interface designed specifically to accommodate multiple high-performance peripherals for graphics, full-motion video, SCSI, and LANs.
    Black Box Explains...UARTs at a glance..

    Universal Asynchronous Receiver/Transmitters (UARTs) are integrated circuits that convert bytes from the computer bus into serial bits for transmission. By providing surplus memory in a buffer, UARTs help applications overcome the factors that can hinder system performance, providing maximum throughput to high-performance peripherals without slowing down CPUs.

    Early UARTs such as 8250 and 16450 did not include buffering (RAM or memory). With the advent of higher-speed devices, the need for UARTs that could handle more data became critical. The first buffered UART was the 16550, which incorporates a 16-byte First In First Out (FIFO) buffer and provides greater throughput than its predecessors.

    Manufacturers have been developing enhanced UARTs that continue to increase performance standards. These faster chips provide improvements such as larger buffers and increased speeds. Here are the rates of today’s common UARTs:

    UART FIFO Buffer Rate Supported
    16550 16-byte 115.2 kbps
    16554 16-byte 115.2 kbps
    16650 32-byte 460.8 kbps (burst rate)
    16654 64-byte 460.8 kbps (burst rate)
    16750 64-byte 460.8 kbps (burst rate)
    16850 128-byte 460.8 kbps (sustained rate)
    16854 128-byte 460.8 kbps (sustained rate)
    Black Box Explains...Low-profile PCI serial adapters..

    Ever notice that newer computers are getting smaller and slimmer? That means regular PCI boards won’t fit into these computers’ low-profile PCI slots. But because miniaturization is the rage in all matters of technology, it was only a short matter of time before low-profile PCI serial adapters became available—and Black Box has them.

    Low-profile cards meet the PCI Special Interest Group (PCI-SIG) Low-Profile PCI specifications, the form-factor definitions for input/output expansion. Low-Profile PCI has two card lengths defined for 32-bit bus cards: MD1 and MD2. MD1 is the smaller of the two, with cards no larger than 4.721 inches long and 2.536 inches high. MD2 cards are a maximum of 6.6 inches long and 2.536 inches high.

    BLACK BOX® Low-Profile Serial PCI cards comply with the MD1 low-profile specification and are compatible with the universal bus. Universal bus is a PCI card that can operate in either a 5-V or 3.3-V signaling level system.
    Black Box Explains...How computer speeds are enhanced with PCI buses and UARTs..

    The Peripheral Component Interconnect (PCI®) Bus enhances both speed and throughput. The PCI Local Bus is a high-performance bus that provides a processor-independent data path between the CPU and high-speed peripherals. PCI is a robust interconnect interface designed specifically to accommodate multiple high-performance peripherals for graphics, full-motion video, SCSI, and LANs.

    UARTs (Universal Asynchronous Receiver/ Transmitters) are integrated circuits that convert bytes from the computer bus into serial bits for transmission. By providing surplus memory in a buffer, UARTs help your applications overcome the factors that slow down your system.