Serial port extended chip

A serial port expansion and chip technology, applied in the field of expansion chips, can solve the problems of low sampling times, difficulty in ensuring data accuracy, software simulation serial port can not achieve a baud rate higher than 4800bps, etc., so as to ensure real-time performance and reduce control leads. foot effect

Inactive Publication Date: 2005-03-30
CHENGDU CORPRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the software analog serial port are: first, the number of samples is low, so the correctness of the data is difficult to guarantee; second, it cannot realize high baud rate communication, and the software analog serial port cannot achieve a baud rate higher than 4800bps

Method used

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  • Serial port extended chip
  • Serial port extended chip
  • Serial port extended chip

Examples

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing:

[0043] Such as figure 1 As shown, the structure of the serial port expansion chip is shown in the figure above. It consists of an oscillator circuit module (OSC), a timer module (Timer), an address processing module (ADDR_Process) responsible for processing input addresses and generating output addresses, and a main control module (Main_Control) responsible for control signal decoding and data flow control. , The command word register (Command_Register) responsible for registering the command word, the data receiving module (Data_Receiver) responsible for receiving the data of the master port and the slave port, the data sending module (Data_Transmitter) responsible for sending the data of the master port and the slave port, and the buffering of the slave port receiving The data buffer (Data_Buffer) and other 8 modules are composed.

[0044] The output terminal of the osc...

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Abstract

The chip includes eight modules: oscillating circuit, timer, address process, main control, register of command word, data receiving module, data transmitting module, and data buffer. Advantages of the invention are: extending serial port from hardware, designed highest baud rate suitable to needs of general system, less system resources utilized, configurable communication formats and compatible to standard serial port communication format.

Description

[0001] Field [0002] The invention relates to an expansion chip, in particular to a serial port expansion chip. Background technique [0003] At present, many electronic systems require serial port communication, but the serial port expansion chips available to electronic engineers are too few or have low cost performance. [0004] There are two communication modes that can be used for information exchange between electronic systems - parallel mode and serial mode. Parallel mode can transmit one byte of data at a time, so at least 8 transmission lines are required, plus several control lines, more transmission cables are required. The parallel transmission method is to increase the data transmission speed by increasing the cost, and is generally used in short-distance transmission. In applications that require long-distance transmission, the use of multiple cables will inevitably lead to high costs, so serial communication is generally used at this time. Serial communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
Inventor 王建辉刘毓梅
Owner CHENGDU CORPRO TECH CO LTD
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