Method for realizing interface of contact smart ic card by simulating on chip of application processor

An application processor, card interface technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of increasing chip cost, lack of interface, long design verification cycle, etc., to achieve the effect of saving chip cost and realizing flexible solutions

Active Publication Date: 2016-02-03
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rise of the CMMB business, the business solution needs to use the authorized decryption chip, and the decryption chip also uses the smart IC card interface, but for the main control chip in the CMMB business solution - the application processor chip, usually Without this interface, if the smart card controller is added in the application processor chip, the cost of the chip will be increased, and the design verification cycle will be longer

Method used

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  • Method for realizing interface of contact smart ic card by simulating on chip of application processor
  • Method for realizing interface of contact smart ic card by simulating on chip of application processor
  • Method for realizing interface of contact smart ic card by simulating on chip of application processor

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Embodiment Construction

[0017] Figure 1 to Figure 3 It shows a schematic diagram of the implementation process of the method for simulating the contact smart IC card interface on the application processor chip of the present invention. The method includes resetting the hardware interface to an analog interface and driving the IC card.

[0018] First you need to reset the hardware interface to an analog interface. Since the contact smart card follows the ISO / IEC7816 specification standard, the interface signal is defined as:

[0019] GND ground, reference voltage

[0020] VCC power input

[0021] I / O serial data input / output

[0022] CLK clock signal input

[0023] RST reset signal input

[0024] VPP programming voltage, selected by the card

[0025] The most important ones are the three signals of I / O, CLK, and RST. The character frame format defined on the I / O signal is as follows: image 3 shown, where:

[0026] ●The start bit is required to be low level,

[0027] ●The parity bit requires...

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Abstract

The invention discloses a method for simulating a contact type smart IC (integrated circuit) card interface on an application processor chip, which resets a hardware interface to a simulation interface, and includes the steps: connecting an I / O (input / output) signal pin on the IC card to a receiving (Rx) pin and a transmitting (Tx) pin of a UART (universal asynchronous receiver / transmitter) interface end on the application processor chip; connecting a CLK (clock ) signal pin on the IC card to a PWM (pulse width modulation) pin; and connecting an RST (reset) signal pin on the IC card to a GPIO (general purpose input / output) pin. The method realizes the smart card interface by using a combination of universal interfaces of the application processor, so that the application processor can support the smart IC card interface, the chip cost is reduced, and functions of the chip are increased.

Description

technical field [0001] The invention relates to a processing method of a smart card interface, in particular to a method for simulating and realizing a contact smart IC card interface on an application processor chip. Background technique [0002] As an information technology, contact smart IC card is widely used in finance, telecommunications and other industries. In this regard, relevant organizations have formulated professional technical standards specifically for IC cards, stipulating the relevant technical characteristics, technical parameters, and technical specifications of IC cards. For example, the ISO / IEC7816-1 international standard describes the physical characteristics of IC cards. All main control chips connected to IC cards are required to meet the above standards, and usually the main control chips in the industry are equipped with special smart card controllers. With the rise of the CMMB business, the business solution needs to use the authorized decrypti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/20
Inventor 徐畅胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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