JP2698659B2 - Portable electronic devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a nonvolatile data memory and a CP
The present invention relates to a portable electronic device called an IC card having a built-in IC (integrated circuit) chip having a control element such as U.

(Prior Art) In recent years, as a new portable data storage medium, a communication that incorporates an erasable nonvolatile data memory and an IC chip having a control element such as a CPU for controlling them and communicates with the outside. Means, keyboard for data entry,
A multifunctional IC card having a display unit for displaying data and data has been developed.

In this type of IC card, a control element accesses a data memory, and selectively performs input / output of necessary data in response to a request from an external device via a keyboard or communication means.

(Problems to be Solved by the Invention) However, in the conventional IC card, display data to be displayed must be stored separately in a display memory area, and non-display data not to be displayed must be stored separately in a non-display memory area. I had to. For this reason, when a set of display data and non-display data related to each other is handled by the communication means, for example, the data cannot be handled collectively, resulting in a problem that communication time is wasted.

Therefore, the present invention can store a related set of display data and non-display data in the same memory area,
Accordingly, it is an object of the communication means to provide a portable electronic device which can collectively handle a set of the related data and can reduce communication time.

[Means for Solving the Problems] A portable electronic device according to the present invention includes a communication unit for communicating with the outside, a memory unit for storing at least one set of related data together with their delimiter data, A display unit for displaying and outputting data, a control unit for controlling them, and a search unit for searching for delimited data in the data stored in the memory unit by accessing the memory unit from the outside by the communication unit. And display control means for displaying, on the display unit, data located in one direction from the delimiter data when the delimiter data exists as a result of the search by the search means.

(Operation) For example, since display data to be displayed and non-display data not to be displayed can be stored in the same memory area, the communication means can collectively handle a related set of the data. And the communication time can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 4 shows the appearance of a multifunctional IC card as a portable electronic device according to the present invention. That is, reference numeral 1 denotes a card body, which is made of, for example, a rectangular thin plastic plate. A predetermined portion of the surface of the card body 1 is electrically connected to an integrated circuit (IC) 2 embedded in the card body 1 and electrically contacts a not-shown external device (eg, a terminal device). A unit 3, a liquid crystal display unit 4 for displaying input / output data, time and the like, and a keyboard 5 for data input are provided. Keyboard 5
Is provided with numeric keys and function keys. A crystal oscillator 6 and a power supply battery 7 are embedded in the card body 1.

FIG. 3 shows a circuit configuration of the above-mentioned IC card. That is, a control element (control section) 11 such as a CPU is responsible for the overall control. The control element 11 is connected to the contact section 3, the liquid crystal display section 4 and the keyboard 5, and transmits various data. A data memory (memory section) 12 for storing, a program memory 13 for storing a processing program of the control element 11 and the like, and a clock circuit 14 are connected, and among these, the control element 11, the data memory 12,
The program memory 13 and the clock circuit 14 are formed by one chip (or a plurality of chips) as the integrated circuit 2, and the integrated circuit 2 is supplied with operating power by a battery 7.

The data memory 12 and the program memory 13 are configured by an erasable nonvolatile memory such as an EEPROM. The clock circuit 14 generates date and time information by counting the reference clock output from the crystal oscillator 6.

In the data memory 12, for example, as shown in FIG. 2 (a), a set of display data (data to be displayed) D1, non-display data (data not to be displayed) D2, and delimiter data S for separating the data is set. There are a plurality of data string storage areas 31 for storing the data strings that have become.

Data string storage area 31 includes a display data storage area 31 ₁ in which the display data D1 is stored, the non-display data storage area and delimited data storage area 31 _2, a non-display data D2 is stored which delimiter data S is stored It has become a 31 ₃ which is adapted to read or write is performed from the external device at once by a communication means for communicating with the outside.

Incidentally, delimited data S is like "FF _H" by one byte, for example, hexadecimal, is in the fixed data.

The display data D1 and the non-display data D2 are of variable length. FIG. 2 (b) shows the case where there is no display data D1, and FIG. 2 (c) shows the case where there is no non-display data D2 and delimiter data S. Is shown.

The program memory 13 stores a processing program for the control element 11 including a search processing program for searching for the delimited data S, a data display processing program, and the like.

Next, the process of displaying the display data D1 in such a configuration will be described with reference to the flowchart shown in FIG. First, the control element 11 searches for the delimiter data S in a set of data string storage areas 31 written by the communication means including the contact part 3 (S1),
It is determined whether or not exists (S2). As a result of this decision,
When the delimiter data S does not exist, the control element 11
The display data D1, which is the contents of the data string storage area 31, is all displayed on the liquid crystal display unit 4 (S3), and the process ends.

As a result of the determination in step S2, when the delimiter data S exists, the control element 11 next determines whether or not the delimiter data S exists at the beginning of the data string storage area 31 (S
Four). As a result of this determination, when the delimiter data S exists at the top, the control element 11 determines that there is no display data, displays nothing (S5), and ends the processing. Here, to display nothing means to stop driving the liquid crystal display unit 4 or to display all blanks on the liquid crystal display unit 4.

As a result of the determination in step S4, if the delimiter data S does not exist at the head, the control element 11 displays the data located before the delimiter data S, that is, the display data D1, on the liquid crystal display unit 4 (S6). , And the process ends.

The display data D1 is displayed as described above, and the delimiter data S is stored in the data string storage area 31 without the display data D1.
Nothing is displayed if it is located at the beginning of.

In this way, only the display data can be displayed, and the communication means can collectively handle the display data and the non-display data.

[Effects of the Invention] As described above in detail, according to the present invention, a set of related display data and non-display data can be stored in the same memory area. One set of data can be handled collectively, and a portable electronic device that can reduce communication time can be provided.

[Brief description of the drawings]

1 is a flowchart for explaining a display process of display data, FIG. 2 is a diagram illustrating a data memory, and FIG. 3 is a circuit configuration of an IC card. FIG. 4 is a perspective view showing the appearance of the IC card. 3 contact part (communication means), 4 liquid crystal display section (display section), 5 keyboard, 11 control element (control section), 12 data memory (memory section), 13 program Memory, 31 ... data string storage area, 31 ₁ ... display data storage area, 31 ₂ ... delimited data storage area, 31 ₃ ...
Non-display data storage area, D1... Display data, D2... Non-display data, S.

Claims (1)

(57) [Claims] A communication unit that communicates with the outside; a memory unit that stores at least one set of related data together with their delimiter data; a display unit that displays and outputs data; a control unit that controls these units; A search unit for searching for delimiter data in the data stored in the memory unit by accessing the memory unit from the outside by a communication unit; and Display control means for displaying and outputting data located in one direction relative to the data to the display unit.