CN105630717A

CN105630717A - Portable logic analyzer

Info

Publication number: CN105630717A
Application number: CN201410575472.XA
Authority: CN
Inventors: 王耀斌
Original assignee: Shaanxi High Tech Energy Development Co Ltd
Current assignee: Shaanxi High Tech Energy Development Co Ltd
Priority date: 2014-10-25
Filing date: 2014-10-25
Publication date: 2016-06-01

Abstract

The invention relates to electronic analyzing equipment, in particular to a logic analyzer. The portable logic analyzer is composed of a computer interface part and a data acquisition part. An upper computer is communicated with a USB master control chip. The data acquisition part is composed of an FPGA slave module, a data cache module, a data acquisition module and a power supply module, all of which are connected in series. The USB master control chip is connected with the FPGA slave module. The portable logic analyzer has following beneficial effects: (MCM) technology based on a multiple-chip assembly is put forward so that size is greatly decreased, weight is lowered and cost is decreased; difficulties of circuit layout and design of electromagnetic compatibility are increased by a compact structure but engineering difficulties are solved by reasonable design; and fine electrical performance is achieved.

Description

A kind of portable logic analyser

Technical field

The present invention relates to a kind of electronic analytical devices, be specifically related to a kind of logic analyser.

Background technology

Logic analyser is widely used instrument in Digital Design verification and debugging process, and it can verify that digital circuit whether normal operation, and help user to search and fix a breakdown. Multiple signal be can catch and show every time, time relationship and the logical relation of these signals analyzed. According to hardware device design on difference, current logic analyser be broadly divided into stand alone type and need in conjunction with the cassette FVLA of computer. Individual logic analyzer performance is excellent, but expensive, the less use of general user.

Summary of the invention

It is contemplated that propose a kind of portable logic analyser.

Technical program of the present invention lies in:

A kind of portable logic analyser, is formed by with computer interface part and part of data acquisition; Wherein, by completing the communication with host computer for USB main control chip, part of data acquisition is by the FPGA being sequentially connected in series from control module, data cache module, data acquisition module, and power supply module forms; USB main control chip is connected from control module with FPGA.

Preferably, described USB main control chip adopts CY7C68013A-56PVXC, by becoming USB2.0 transceiver, enhancement mode 8051 microprocessor, FX2 and integrated 1²C controller forms.

Preferably, the XC6SLX9-4TQl44C that described FPGA adopts from control module.

Preferably, described data acquisition module sheet is a kind of 16 tristate bus line transceivers, adopts SN74LVCl6245ADGGR.

Or preferably, described data cache module adopts CMOS static RAM chip IS61LV25616.

Or preferably, described power supply module adopts LM1117 voltage stabilizing chip, it is provided that 3.3V and 1.2V voltage.

The method have technical effect that:

The present invention proposes based on multi-chip module (MCM) technology, and it can reduce volume significantly, alleviates weight, reduce cost simultaneously. Though compact structure adds the difficulty of circuit layout and EMC Design, but is solved the difficult point in engineering by rational design approach, it is achieved good electric property.

Detailed description of the invention

Wherein, USB main control chip adopts CY7C68013A-56PVXC, by becoming USB2.0 transceiver, enhancement mode 8051 microprocessor, FX2 and integrated 1²C controller forms. The XC6SLX9-4TQl44C that FPGA adopts from control module. Data acquisition module sheet is a kind of 16 tristate bus line transceivers, adopts SN74LVCl6245ADGGR. Data cache module adopts CMOS static RAM chip IS61LV25616. Power supply module adopts LM1117 voltage stabilizing chip, it is provided that 3.3V and 1.2V voltage.

USB main control chip connects 24MHz crystal oscillator, and PB mouth receives the data fifo coming from FPGA, and 15 feet and 16 feet meet D+ and the D-of USB_B type interface, for sending data to host computer, receives PC control information simultaneously. 1²C bus connects an ATl24G64 (EEPROM) and is used as USB program storage. Remaining pin is for reading the current state of FPGA and sending the information such as triggering to FPGA, to determine when to be read out data.

Data acquisition chip adopts SN74LVCl6245ADGGR, is 16 tristate bus line transceivers. When OE pin connects high level, it is output as high-impedance state. When OE is low, if DIR pin is low level, then data are from B oral instructions to A mouth, and when DIR is high level, data are from A oral instructions to B mouth.

What power supply chip selected is LM1117 series voltage stabilizing chip, has 3.3V and 1.2V. What power supply input adopted is earphone-type jack power supply, inputs as 5V, 1A. If powering with USB, being 500mA owing to USB maximum exports electric current, when being therefore likely to occur the inadequate situation of electric current when high-speed sampling, can be selected for external power supply.

Claims

1. a portable logic analyser, it is characterised in that: formed by with computer interface part and part of data acquisition; Wherein, by completing the communication with host computer for USB main control chip, part of data acquisition is by the FPGA being sequentially connected in series from control module, data cache module, data acquisition module, and power supply module forms; USB main control chip is connected from control module with FPGA.

2. such as claim 1 portable logic analyser, it is characterised in that: described USB main control chip adopts CY7C68013A-56PVXC, by becoming USB2.0 transceiver, enhancement mode 8051 microprocessor, FX2 and integrated 1²C controller forms.

3. such as claim 1 portable logic analyser, it is characterised in that: the XC6SLX9-4TQl44C that described FPGA adopts from control module.

4. claim 1 portable logic analyser, it is characterised in that: described data acquisition module sheet is a kind of 16 tristate bus line transceivers, adopts SN74LVCl6245ADGGR.

5. claim 1 portable logic analyser, it is characterised in that: described data cache module adopts CMOS static RAM chip IS61LV25616.

6. claim 1 portable logic analyser, it is characterised in that: described power supply module adopts LM1117 voltage stabilizing chip, it is provided that 3.3V and 1.2V voltage.