CN105487969B

CN105487969B - Intelligent card emluator

Info

Publication number: CN105487969B
Application number: CN201410528007.0A
Authority: CN
Inventors: 许国泰
Original assignee: Shanghai Huahong Integrated Circuit Co Ltd
Current assignee: Shanghai Huahong Integrated Circuit Co Ltd
Priority date: 2014-10-09
Filing date: 2014-10-09
Publication date: 2018-08-14
Anticipated expiration: 2034-10-09
Also published as: CN105487969A

Abstract

The invention discloses a kind of intelligent card emluator, including emulation chip, management module, SRAM memory, power modules；The emulation chip is written and read operation by normal data/address bus to SRAM memory；When cold reset occurs, the management module enters or exits reset state by controlling signal control emulation chip, stops or restore to power to SRAM memory by controlling signal control power supply module；XRAM in SRAM memory equivalent simulation chip.The present invention can equivalent implementation cold reset, ensure that intelligent card emluator allomeric function, performance are consistent with actual chips.

Description

Intelligent card emluator

Technical field

The present invention relates to emulator fields, more particularly to a kind of intelligent card emluator.

Background technology

The user program for having User Exploitation in processor chips, in the writing and debug of user program, used work Tool is usually processor chips emulator.Using the emulation chip for including product treatment device chip various functions in emulator, use In the work behavior of analog equipment chip processor, emulation chip with emulator other component (deposit by the program of storage user program Reservoir, the data storage for storing data and the Integrated Development Environment etc. on user computer) coordinate and realizes the imitative of user program True operation and every debugging function.

Generally use SRAM (Static Random Access Memory, static RAM) in emulator Carry out in equivalent substitution product chips to be used as XRAM (the on-chip expanded Random Access of data storage Memory, piece is interior to extend static RAM), all it is equivalent in functional performance in write-in, reading data.

It is to obtain power supply, i.e. contact intelligence from card reader during intelligent card chip coordinates card reader use Card obtains power supply from the energization pins of contact card reader, and contact type intelligent card is from the carrier wave that contactless card reader is sent out Obtain power supply, the not no power supply of oneself of intelligent card chip itself.In practical applications, card reader can pass through switch contact formula Power supply or contactless power supply carrier wave re-power to enable intelligent card chip carry out cold reset after intelligent card power failure It starts to work.Since cold reset is that chip re-powers, therefore the XRAM in chip is as common XRAM, the data meeting before power down It loses, not expected random value can be become by re-powering the data in rear XRAM all.On intelligent card emluator, card reader hair After playing cold reset, an electrification reset process is equivalent in intelligent card emluator, program execution pointer, register value etc. are all Electrification reset value is may return to, this is consistent with actual chips state.But since card reader can not provide enough work( Consumption, intelligent card emluator all powered using oneself independent current source, due to ungenuine power down and re-powers process in this way, But primary reset has been done, the XRAM contents in intelligent card emluator will not change, before still initiating power down with card reader Data it is the same, the function that this has been resulted on emulator with actual chips is inconsistent, influence personal code work exploitation use.Such as Fruit by simulator components card reader initiate power down after, all data modifications in the regions XRAM in emulator at random value, although Can functionally accomplish it is consistent with actual chips, but since XRAM capacity is increasing, this modification process take caused by Emulator is very important and increasing with chip differences, so this method and undesirable.

Invention content

The technical problem to be solved in the present invention is to provide a kind of intelligent card emluator, can equivalent implementation cold reset, ensure Intelligent card emluator allomeric function, performance are consistent with actual chips.

In order to solve the above technical problems, the intelligent card emluator of the equivalent cold reset of the present invention, including emulation chip, management Module, SRAM memory, power module；XRAM in SRAM memory equivalent simulation chip；

The emulation chip is written and read operation by normal data/address bus to SRAM memory, in analog chip Processor operates the function of XRAM；When cold reset occurs, in card reader cut-out contact power supply or contactless carrier wave is closed Afterwards, management module enters reset state by controlling signal control emulation chip, passes through and controls the stopping of signal control power supply module It powers to SRAM memory；Card reader resumes contacts formula power supply or after opening contactless carrier wave, and management module, which passes through, controls letter Number control emulation chip exit reset state, by control signal control power supply module recovery to SRAM memory power.

The intelligent card emluator of the present invention can equivalent implementation cold reset, the data in emulator XRAM before cold reset can lose It loses, the data after cold reset in XRAM can all become not expected random value, be functionally consistent with actual chips, and property Can on it is also almost the same, ensure that the consistency of intelligent card emluator allomeric function, performance and actual chips；Facilitate user's journey Exploitation, debugging and the test of sequence.

Description of the drawings

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments：

Attached drawing is the structural schematic diagram of the intelligent card emluator.

Specific implementation mode

As shown, the intelligent card emluator 1, including emulation chip 2, management module 3, SRAM memory 4, power supply mould Block 5.The SRAM memory 4 is connect by normal data/address bus 6 with emulation chip 2, in equivalent simulation chip XRAM.Management module 3 respectively controls emulation chip 2 and power module 5 by controlling signal 7.Power module 5 passes through confession Electric wire 8 is connect with SRAM memory 4, is powered to SRAM memory 4.SRAM memory has as XRAM in power down again After electricity, in data can all become the characteristic of not expected random value.

Emulation chip 2 is written and read operation by normal data/address bus 6 to SRAM memory, locates in analog chip Manage the function of device operation XRAM.When cold reset occurs, after card reader cut-out contact power supply or closing contactless carrier wave, pipe It manages module 3 and controls emulation chip 2 into reset state by controlling signal 7, power module 5 is controlled by control signal 7 and is stopped It powers to SRAM memory；Card reader resumes contacts formula power supply or after opening contactless carrier wave, and management module 3, which passes through, controls letter Numbers 7 control emulation chips 2 exit reset state, and controlling power module 5 by controlling signal 7 restores to power to SRAM memory 4.

In this way, after cold reset, in intelligent card emluator 1 for user program, program execution pointer, register value etc. It is returned to electrification reset value, the data in XRAM have also been changed to random value, are functionally consistent with actual chips state. Meanwhile during cold reset, power module 5 has only done the once stopping to SRAM memory 4 and the action that restores electricity, and takes With actual chips cold reset time consistency, also ensure that intelligent card emluator 1 is consistent with actual chips in cold reset performance Property.

The foregoing is merely the specific implementation mode and embodiment of the present invention, the scope of the present invention is not limited thereto.

Claims

1. a kind of intelligent card emluator, including：Emulation chip, management module, SRAM memory, power module, the emulation core Piece is written and read operation by normal data/address bus to SRAM memory；It is characterized in that：The SRAM memory is equivalent XRAM in analog chip, the function of the emulation chip analog chip inner treater operation XRAM；When cold reset occurs, After card reader cut-out contact powers or closes contactless carrier wave, management module, which passes through, controls signal control emulation chip entrance Reset state stops powering to SRAM memory by controlling signal control power supply module；Card reader resume contacts formula power supply or After opening contactless carrier wave, management module exits reset state by controlling signal control emulation chip, passes through and controls signal Control power module restores to power to SRAM memory.