JPS61122735A - Electronic apparatus - Google Patents

Abstract

PURPOSE:To prevent an electronic apparatus from misoperation or misswitching by forming a normal key, a function key and an operation mode switching key and discriminating a key combination input to switch the operation mode. CONSTITUTION:When the function key (CONT) 21 is depressed, a code C-C is generated, decoded by a decoder part 16 and converted into a decode level CC to output the decode level CC. The decode level CC is sent to a keyboard part 2 to turn on a display unit 22. The decode level CC is stored in the decoder part 16 until the succeeding prescribed combination code is received. When the operator depresses an '0' key 23, the decoder part 16 decodes a generated code C-O, finds out the AND between the decoded value and the already stored decode level CC and outputs the AND as a decode level CC.O. Consequently, an FF 15 is inverted and the operation mode is switched from an off-line typewriter mode to a remote printer mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to electronic equipment, and particularly to electronic equipment that has a plurality of operation modes and is required to be small and lightweight.

``Prior Art'' Toshichika, small electronic typewriters equipped with word processing functions are in heavy use. This type of device is convenient and economical because it can be used as a portable off-line typewriter with editing functions, or as a remote printer for a host device with the addition of a simple attack. However, for this purpose, it is necessary to switch the operation mode of the device, and a method or means is required that can switch the operating mode in a limited space and reliably in ms.

Conventionally, this point was inconvenient. A certain device went into typewriter mode as soon as the power was turned on, and once it had been used as a remote printer by some means, there was no way to return it to typewriter mode other than to turn the power back on. Furthermore, because some devices have a special switch for mode switching, they do not meet the requirements for compactness and simplicity required for this type of device.

The present invention has been made in view of the above-mentioned shortcomings of the prior art, and its purpose is to alternately and reliably change operating modes by using existing key manual means. The purpose is to provide electronic equipment that can be switched.

〔Example〕

Hereinafter, a further embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure M1 is a block diagram of the electronic typewriter according to the embodiment. The switching configuration is shown. 1
1 is a printer control unit that sends character codes etc. to the printer unit 3 to control printing; 12 is an input-only RO control that receives and receives print data from an external connection device (for example, a host computer) and sends it to the printer control unit 11; 13 and 14 are AND gates that switch the flow of data; 15 is a mode flip-flop (FF) that stores and holds the operating mode of whether the device operates as an offline typewriter or a remote printer; and 16 is a keyboard. This is a decoder unit that determines the combination of the key manual code and the key manual code from unit 2.

In the above configuration, when the device is powered on, the power-on reset signal FOR/ is generated and the mode FF15
Forcibly set. Therefore, the output Q becomes HIGH level, and the key manual data from the keyboard section 2 becomes AN
It is sent to the printer section 3 via the D gate 14. This is the so-called offline typewriter mode.

If you want to switch the device to remote printer mode in this state, first press the function key (CONT) 21.The 0 function key 21 is normally provided in this type of device. The resulting code CC is decoded by the decoder section 16, converted into a code level CC, and output. Furthermore, the code level CC is sent to the keyboard section 2, which lights up a display 22 to inform the operator that the function input is valid. Then, this decoding level CC is determined by the next necessary combination code (for example, O
The code of the key 23) is held in the decoder section 16 until the code of the key 23 is reached. Next, when the operator presses the O key 23, the code C
-0 occurs. The decoder unit 16 decodes the code C-0, performs a logical product with the already stored decode level CC, and outputs the decode level CC@O. CC-
0 is input to the clock terminal of mote FF15, and g
Invert FF15, which inverts the operating mode,
From then on, the data received by the RO control section 12 will be sent to the printer section 3.

This is the so-called remote printer mode.

Next, when the same key operation is performed manually, the decoder section 16
A decode level CC-0 is output from , and its edge inverts mode FF15.

This returns the device to the off-line typewriter mode again, allowing the keys of the keyboard section 2 to be printed again.

FIG. 2 is a block diagram showing another embodiment in which the above-described operations are implemented by executing a program. In Fig. 0, the same numbers are assigned to the same components as in Fig. 1, and the explanation thereof is omitted.In Fig. 0, 17 is a central processing unit (CPU) that is in charge of the main control of the embodiment device, and 18 is a central processing unit necessary for control. 19. RAM including various flags FL, KFL and buffer B for temporarily storing data; 19. is shown in Figure 3(a),
This is a ROM that stores the control program shown in Cb).

FIG. 3(a) is a flow chart showing the operation of the embodiment of FIG. When the device is powered on in step (S)1, the key manual code is processed in step S2.
If there is no key manual operation to switch the operating mode from the keyboard section 2, it is normal key manual operation, and the flow exits to a and goes to S3, where typewriter processing is performed. Every time the switch is pressed, the key data is Yatsufa B, AN
Printing is repeatedly performed via the route of the D gate 14 by the offline type printing process described above.

In addition, by detecting that a mode switching operation has been performed in S2 (for example, as described above (a combination of the C0NT key and O key has been performed), the flag FL is set.
and such a set causes the flow to exit to b and go to 34 to enter the remote printer mote. However, even S4 and S2
Since code processing equivalent to that of
can be reset to return to offline typewriter processing.

FIG. 3(b) is a flowchart showing details of the code processing in FIG. 3(a). When input to code processing, 52
In step 1, it is determined whether the key force code is the code C-C of the function key 21, and if it is the function key code, a message is displayed on the display section 22 in step S22 to inform the operator that function designation input is possible. In S23, the function flag KFL is turned ON and the process exits to a. Next, there is the code C-0 of the 0 key 23.

The process goes from 321 to 324, and the determination in S24 is satisfied. S
25, it is determined whether the a-function flag KFL is ON or not, and it is turned ON.
If so, the function keys should be integrated.
Then, the function flag KFL is turned OFF, and although not shown, the flag FL is inverted and the process exits to b.

[Effects] As described above, according to the present invention, the operation mode switching operation is performed by two actions at the same time or one after another, unlike the operation mode switching operation which is performed by one action using a specific switch, etc., so that operation errors and Erroneous switching due to easy operation is prevented.

Further, according to the present invention, it is possible to switch from typewriter mode to printer mode and from printer mode to typewriter mode with the same operation, so there are fewer erroneous operations. Furthermore, since the existing key manually operated means can be used, there is no need to provide any special key in appearance, and the small size and simple nature can be maintained.

Further, according to the present invention, multiple functions can be incorporated into a limited number of keys or switches.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic typewriter according to an embodiment, FIG. 2 is a block diagram showing another embodiment, FIG. 3(a) is a flowchart showing the operation of the embodiment of FIG. FIG. 3(b) is a flowchart showing details of the code processing in FIG. 2. Here, ■...Device main body, 2...Keyboard section, 3
... Printer section, 11... Printer control section, 12.
...RO control section, 13 and 14...AND gate, 1
5...Mode flip frog (FF), 16...
This is the Tekota section. Figure 1 Figure 2

Claims (3)

[Claims] (1) In an electronic device having multiple operation modes, the operation mode is switched by determining a normal key for data input, a function key that gives a specific function to the normal key, and a combination operation input of the keys. An electronic device comprising an operation mode switching means. (2) The electronic device according to claim 1, wherein a plurality of operation modes are alternately switched by the same combination of keys. (3) The electronic device according to claim 1 or 2, wherein one operation mode is an offline typewriter and the other operation mode is a remote printer.