Unlock instant, AI-driven research and patent intelligence for your innovation.

Semiconductor integrated circuit

A technology of integrated circuits and semiconductors, applied in the field of semiconductor integrated circuits, which can solve the problems of inability to cover communication protocols and the need to update software for communication protocols.

Active Publication Date: 2016-08-10
KK TOSHIBA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to cover all communication protocols, and there is a problem that the communication protocol needs to update the software in different regions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semiconductor integrated circuit
  • Semiconductor integrated circuit
  • Semiconductor integrated circuit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ）

[0020] figure 1 It is a block diagram showing the semiconductor integrated circuit of the first embodiment of the present invention.

[0021] The data transmitted and received in this embodiment is data having a frame structure including a preamble, a start flag, a data body, an end flag, and a postamble. E.g, figure 2 It is an explanatory diagram showing an example of such a data frame, showing the frame structure specified by the Chinese ETC communication standard (GB / T2085.2-2007).

[0022] figure 2 The data frame shown is composed of a preamble, frame start mark, MAC address, MAC control field, LPDU (LLC Protocol Data Unit), and frame check (frame check). ), frame end mark (frameend mark), and postamble. The data body (Information frame) is composed of MAC address, MAC control field, LPDU and frame check. The MAC address (MAC address) is 32 bits long, the MAC control field (MAC control field) is 8 bits long, and the LPDU is a command or response in the format specified by t...

no. 2 approach ）

[0097] Picture 8 It is a block diagram showing the second embodiment of the present invention. in Picture 8 Middle pair and image 3 The same components are given the same reference numerals, and the description is omitted. The difference between this embodiment and the first embodiment is that a receiving unit 50 is used instead of the receiving unit 13, and the receiving unit 50 is image 3 The difference of the receiving unit 13 is the addition of a counter 51.

[0098] In order to reliably detect the standard change, in this embodiment, when the same preamble candidate or the same postamble candidate is detected multiple times, the candidate is replaced with the setting value of the control register corresponding to the protocol and used for detection.

[0099] In a part of the control register 18, a frequency register that specifies the threshold value of the detection frequency of each of the preamble candidate and the postamble candidate is set. MCU5 sets the threshold of...

no. 3 approach ）

[0105] Picture 9 It is a block diagram showing the third embodiment of the present invention. in Picture 9 Middle pair and image 3 The same components are given the same reference numerals, and the description is omitted. The difference between this embodiment and the first embodiment is that a receiving unit 55 is used instead of the receiving unit 13, and the receiving unit 55 and image 3 The difference of the receiving unit 13 is that a postamble candidate conversion unit 56 is used instead of the postamble candidate search unit 32.

[0106] The preamble and the postamble are sometimes set to have related bit strings based on different communication protocols. In this case, the postamble can be obtained from the preamble. The postamble candidate conversion unit 56 uses the preamble candidates detected by the preamble candidate detection unit 31 to generate postamble candidates through predetermined conversion processing.

[0107] For example, when a plurality of different ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Data can be transmitted and received even if the communication protocol is changed. The semiconductor integrated circuit of the embodiment includes: a preamble detection unit that detects a preamble from a received signal; a start marker detection unit that operates independently of the preamble detection unit and detects a start marker from a received signal; a decoding unit that detects a start marker from a received signal. Based on the detection of at least one of the preamble and the start marker, the operation is performed to decode the received signal; the control unit, even if an error occurs in one of the detection of the preamble detection unit and the start marker detection unit, The decoding result of the decoding part is processed; the preamble candidate detection part, when the detection of the preamble detection part becomes an error, uses the detection position of the start mark as a reference, estimates the preamble from the received signal, and uses it as a preamble a code candidate; and a postamble candidate conversion unit configured to generate a postamble candidate for detection by the postamble detection unit based on the preamble candidate.

Description

Technical field [0001] The embodiments of the present invention relate to semiconductor integrated circuits. Background technique [0002] In the past, an automatic payment system (ETC (Electronic Toll Collection System)) was developed to automatically pay fees at toll stations on toll roads. In ETC, information related to tolls and payment is transmitted and received by radio between the vehicle-mounted device and the base station installed at the toll station, and tolls are paid. [0003] ETC has different standards in different countries in the world, and each country adopts its own independent communication protocol. In the case of a change in the communication protocol, it is necessary to make a design change to the LSI for ETC. In addition, in ETC, different frame structures and synchronization signals may be used due to different regions. For example, it may happen that the ETC equipment used in metropolitan area A cannot be used in metropolitan area B. In this case, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/10
Inventor 北泽伦子
Owner KK TOSHIBA