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产品介绍： |
产品简介：
PRA-7198系列是一款带有8个RS-232串行的通信接口卡，所以端口都可以通过卡上的跳线单独设置.PRA-858系列接口可上的全部8个端口都能够支持自动寻址。所以通道均可共享同一个中断（IRQ），中断状态寄存器（向量地址）会指出该中断来自哪个端口。共享中断可以设置为最常用的（扩展）AT中断。它能够简化编程，加快中断处理并为其他设备空出中断资源。
Product Introduction:
The PRA-7198 series interface cards provide eight RS-232 serial communication ports. Each port can be configured individually using on-board jumpers. ThePRA-7198 series cards support automatic addressing for all eight ports. All channels share the same interrupt (IRQ), and an interrupt status register can be used to determine the interrupt source. When an on-board interrupt occurs the interrupt status register (vector address) indicates which port generated it. The shared interrupt can be set to most common (extended) AT interrupts. This simplifies programming, speeds up interrupt processing and frees up interrupts for other devices.
| 性能特点： |
◆ 8个独立的RS-232串行端口
◆ 传输速率可达921.6 Kbps
◆ 独立I/O地址，4个串口使用单独或共享的IRQ
◆ 多个IRQ可供选择：3, 4, 5, 6, 7, 9, 10, 11, 12 或 15
◆ 支持浪涌保护：3000 VDC |
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