NFC-SIM (Near Field Communication-Subscriber Identity Module) card chip simulator

Abstract

The invention discloses an NFC-SIM (Near Field Communication-Subscriber Identity Module) card chip simulator which comprises a simulation chip and a detection control module, wherein an SWP (Single Wire Protocol)_2 pin of the detection control module is connected with an SWP_1 pin of the simulation chip, a SWP_3 pin of the detection control module is connected with a C6 contact pin 6 of terminal card-reading equipment, and a power-supply detecting pin of the detection control module is connected with a power-supply output pin of the terminal card-reading equipment; the detection control module is used for detecting the level on the power-supply detecting pin, and if the detected level is below 2V, the SWP_2 pin and the SWP_3 pin are directly short-circuited inside the detection control module; and if the detected level is above 2V, a 0V low level is directly output to the SWP_1 pin of the simulation chip. When the SIM function part of a user program is debugged, the NFC-SIM chip simulator can be matched with NFC terminal equipment to normally work without shielding a program segment for detecting an SWP interface in the user program at the real time, satisfies the debugging habit of a user, facilitates the debugging process of the user and benefits the improvement of the debugging efficiency.

Description

technical field [0001] The invention relates to the field of integrated circuit chip emulators, in particular to an NFC-SIM card chip emulator. Background technique [0002] NFC-SIM card chip is a new generation of smart card chip that combines the functions of NFC (Near Field Communication) and SIM (Subscriber Identity Module) card functions. It provides the functions of traditional SIM cards and includes NFC It is mainly used in new fields such as mobile payment. Like other smart card chips, the NFC-SIM card chip also has a user program developed by the user, but unlike the user program in the SIM card, the user program in the NFC-SIM card chip includes the realization of the SIM card function and the realization of the NFC function. Two-part procedure. When the NFC-SIM card chip works with NFC mobile phones (mobile phones supporting NFC technology), the SIM function module in the user program communicates with the SIM card module of the mobile phone through the 7816 int...

AI Technical Summary

Problems solved by technology

However, since the vast majority of contact card readers only support the 7816 interface and do not support the NFC SWP interface, the C6 pin on the card reader is suspended, so when connecting these card readers, the NFC-SIM card chip emulator The signal level detected on the SWP of the emulation chip is an indeterminate state

In this way, when the NFC-SIM card chip emulator is connected to these card readers to debug the SIM function of the user program, because the signal on the SWP interface (C6) is still detected in real time in the user program, what is detected is an indeterminate signal level. The program will enter the processing of error and exception, resulting in that the SIM function part of the user program cannot be debugged normally by using the contact card reader.

[0004] The existing solution is that if the user uses a contact card reader to debug the SIM function part of the user program, it is necessary to annotate (i.e. shield) all the program segments that detect the SWP interface in real time in the user program. When the NFC mobile phone is connected to debug the NFC In the functional part, these program segments must be opened again, which is very inconvenient and affects the efficiency of debugging work

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