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Interface circuit supporting simultaneous debugging of SWP (single wire protocol) and 7816 interfaces and interface circuit supporting simultaneous debugging method

A technology of SWP interface and interface circuit, which is applied in software testing/debugging, electrical digital data processing, detecting faulty computer hardware, etc., and can solve problems such as failure to send test commands

Active Publication Date: 2017-01-25
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a dual-interface chip that only includes 7816 interface and SWP interface, test commands cannot be sent through one of the interfaces during the test

Method used

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  • Interface circuit supporting simultaneous debugging of SWP (single wire protocol) and 7816 interfaces and interface circuit supporting simultaneous debugging method
  • Interface circuit supporting simultaneous debugging of SWP (single wire protocol) and 7816 interfaces and interface circuit supporting simultaneous debugging method

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Experimental program
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Embodiment Construction

[0032] The interface circuit and method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the interface circuit includes 3 modules and 4 external interfaces: 3 modules include a signal switching module, a power reset processing module, and a power reset generating module; 4 interfaces include interface 1, interface 2, interface 3, and interface 4. The signal switching module performs signal switching under the control of the GPIO_kit1 signal of the interface 2, realizes the interconnection between the interfaces after power-on initialization, and the interconnection between the interfaces during the normal communication of the SWP interface.

[0034] The power-on initialization process includes the following two operations:

[0035] Operation 1: When powering on and initializing, interface 1 is connected to interface 2, CLK_swp is connected to CLK_kit1, RST_swp is connected to RST_kit1...

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PUM

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Abstract

The invention discloses an interface circuit supporting simultaneous debugging of SWP (single wire protocol) and 7816 interfaces and an interface circuit supporting simultaneous debugging method, and relates to the field of chip multi-interface debugging and testing. The interface circuit having the signal switching function comprises three modules and four external interfaces, the three modules include a signal switching module, a power reset producing module and a power reset generating module, and the external interfaces include a first interface, a second interface, a third interface and a fourth interface; an emulator or a chip with the 7816 interface is connected through the interface circuit for state response, test commands are sent through 7816 interface equipment, and an SWP interface program of the emulator or the chip is tested by the aid of SWP interface equipment. By the aid of a mobile cell or the other SWP interface equipment, the SWP interface function of the chip is tested, and test efficiency can be greatly improved especially for stable and compatible tests.

Description

technical field [0001] The invention relates to an interface circuit and method for simultaneous debugging of SWP and 7816 interfaces, which are mainly used in the field of chip multi-interface debugging and testing. Background technique [0002] For smart card chips that support the SWP interface, one of the main application areas is as a SIM card to support contactless communication in NFC mobile phones. For the test of the chip SWP interface, especially the compatibility test, using a mobile phone as a test device has become the most effective way. The mobile phone will send a 7816 query status command during the communication process of the SWP interface. If there is no response from the 7816 interface, it will be powered off and powered on again, resulting in the interruption of the test. Usually, the mobile phone is used to test the SWP interface. It is necessary to have the SWP interface test program in the program under test, and to add the 7816 interface power-on i...

Claims

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Application Information

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IPC IPC(8): G06F11/26G06F11/22G06F11/36G06F11/273
CPCG06F11/221G06F11/261G06F11/2733G06F11/3652G06F11/3656G06F11/3664G06F11/3696
Inventor 张洪波刘刚
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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