XVME-491   串行 I/O 模块  单板计算机

XVME-491 Quad RS-422/485 串行 I/O 模块

特点:

20 MHz 80386SX处理器

1、4或8兆字节的双存取DRAMVGA图形

·两个串行端口

一个并行端口

·软盘和硬盘控制器xfme单板计算机是一个B尺寸的VME模块。本产品有前面板LED指示灯。XVME-491 有一个VGA连接器-个母DB-25LPT-1

连接器、两个公DB-9 COM连接器和一个DIN-5键盘连接器

处理器模块通常指的是计算机中负责处理数据和指令的核心部件。在计算机体系结构中，处理器模块通常包括控制单元、指令单元、存储单元和执行单元等部分。

XVME-491 控制单元负责协调指令的执行顺序，确保程序的正确执行。它根据预先编好的程序，依次从存储器中取出每条指令，放入指令寄存器，通过指令解码（分析）来确定要执行的操作。

XVME-491 指令单元负责解释和执行指令，将指令发送给执行单元。执行单元包括算术运算器和逻辑运算器等，负责执行算术和逻辑操作。它可以将数据存储在寄存器中，以及处理分支和跳转操作。

XVME-491存储单元是处理器中用于存储数据和指令的地方，包括CPU片上缓存和寄存器组等。它保存等待处理的数据或已处理的数据，以提高访问速度和效率。

XVME-491 Quad RS-422/485 Serial I/O module

Features:

20 MHz 80386SX processor

1, 4, or 8 megabytes of dual-access DRAMVGA graphics

· Two serial ports

A parallel port

· Floppy Disk and Hard Disk controller The xfme single board computer is a B-size VME module. This product has a front panel LED indicator. The XVME-491 has one VGA connector - a female DB-25LPT-1

Connectors, two male DB-9 COM connectors, and a DIN-5 keyboard connector

The processor module usually refers to the core part of the computer responsible for processing data and instructions. In computer architecture, processor module usually includes control unit, instruction unit, storage unit and execution unit.

The XVME-491 control unit is responsible for coordinating the execution sequence of instructions and ensuring the correct execution of the program. According to the pre-programmed program, it takes out each instruction from the memory in turn, puts it into the instruction register, and determines the operation to be performed through instruction decoding (analysis).

The XVME-491 instruction unit interprets and executes the instructions, sending them to the execution unit. The execution unit includes arithmetic arithmetic unit and logic arithmetic unit, which are responsible for performing arithmetic and logic operations. It can store data in registers, as well as handle branch and jump operations.

The XVME-491 memory unit is the place in the processor used to store data and instructions, including CPU on-chip cache and register groups. It saves data that is waiting to be processed or that has been processed to improve access speed and efficiency.