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IC card, IC card system, and data processor

A data processing device and data processing technology, applied in the direction of cooperative operation devices, record carriers used by machines, printing, etc., can solve the problem of increasing the number of parts and achieve the effect of reducing the number of parts

Inactive Publication Date: 2006-10-18
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, there is a problem that the number of parts increases when configuring an interface using signals of these two methods

Method used

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  • IC card, IC card system, and data processor
  • IC card, IC card system, and data processor
  • IC card, IC card system, and data processor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, an example of an IC card (storage device) applicable to the present invention will be described.

[0032] figure 1 The configuration of the system composed of the data processing device 21 and the IC card 26 is shown. The data processing device 21 includes: a data processing part 22 and a register 23 , a host-side serial interface circuit 24 , and a host-side controller 25 . Furthermore, the IC card 26 is a storage medium having a card-like shape, and can be used as an external storage device connected to the data processing device 21 . The IC card 26 includes: a memory 27 , a register 28 , a card-side serial interface circuit 29 , and a card-side controller 30 .

[0033] The data processing section 22 of the data processing device 21 reads data stored in the IC card 26 and processes various data, and converts the various data into data written in the IC card ...

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PUM

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Abstract

When a single-ended signal is used for communication in one direction, a signal is provided from the transmitter 5 to the receiver 6 through the bleeder resistor R1 / / R2. During communication in the other direction, a signal is supplied from the transmitter 8 to the receiver 7 through the bleeder resistors R1 / / R2. At this time, the differential signal transmitters 9, 12 and differential signal receivers 10, 11 are disabled, and the communication line is in a high impedance state. When one-way communication of the differential signal is performed, a signal is supplied from the transmitter 9 to the receiver 10 through the terminating resistor R1. When communicating in the other direction, a signal is supplied from the transmitter 12 to the receiver 11 through the terminating resistor R2. At this time, the single-ended signal transmitters 5 and 8 and the single-ended signal receivers 6 and 7 are prohibited, and the communication line is in a high-impedance state.

Description

technical field [0001] The invention relates to an IC card, an IC card system and a data processing device capable of realizing the coexistence of single-ended signals and differential signals when using a detachable IC card. Background technique [0002] As the interface between the data processing device and the IC card, there may be a configuration using a single-ended signal and a configuration using a small-amplitude differential signal. Single-ended signals are such as TTL level (for example, 3.3V), and differential signals are such as ±200MV level signals. For single-ended signals, compared with differential signals, only half the number of required signal transmission lines is required, so in order not to increase signal lines, more single-ended signals are used. On the other hand, if a differential signal is used, the signal level is low and good, thereby reducing power consumption, and at the same time, because it is a differential signal, it has the advantage of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/08G06K17/00G06K19/07B42D25/305G06K7/00G06K19/073G06K19/077
CPCG06F3/08G06K7/0008G06K7/0013G06K7/0086G06K19/073G06K19/077G06K19/07
Inventor 田代淳
Owner SONY CORP