JPS60159923A - Keyboard - Google Patents

Abstract

PURPOSE:To use the titled keyboard for two kinds of data processing devices having data buses of N bits and 2N bits by forming the first and the second key matrixes having key information read lines of N pieces and scan lines of M pieces, on the same substrate. CONSTITUTION:Connectors TS1-TS6, TD0-TD15 provided on a substrate BD are used for connecting scan lines S1-S6 and key information read lines D0- D5 on the substrate BD, and signal lines S1-S6, d0-d15 on a data processing device UNIT, and the signal lines S1 and S4, S2 and S5, and S3 and S6 are connected to each other by a printed circuit, and connected to outputs of drivers DR1-DR3. Also, the signal lines d0-d15 are connected to each bit of a data bus BUS of 16 bits through drivers DR4-DR20. Accordingly, a scan signal is inputted successively to the drivers DR1-DR3, by which key information can be read through signal lines of 16 pieces, and a keyboard of a 16-bit 3-scan system can be realized.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a keyboard, and more particularly to a keyboard that can be used for both a 2N via) M scan type keyboard and an N bit 2M scan type keyboard.

PRIOR ART AND PROBLEMS In general, a scan-type keyboard for inputting information on a maximum of NXM keys, for example 48 keys, into a data processing device is not suitable for a data processing device with a data bus width of 8 bits. An 8-bit 6-scan keyboard as shown in FIG. 1 is used, and a 16-bit 3-scan keyboard as shown in FIG. 2 is used for a data processing device with a data bus width of 16 bits. That is, in the keyboard of FIG. 1, eight key information reading lines DO~
By connecting D7 to an 8-bit bus of a data processing device (not shown) and sequentially selecting scan lines 81 to S6, scan lines 81 to S6 and key information reading lines DO-D7 are connected.
The on/off information of the switches 5tni to 5W48 arranged at the intersections with the data processing device is read through the key information reading lines DO to D7, and in the keyboard of FIG. By connecting to a 16-bit bus and sequentially selecting scan lines 31 to S3, scan lines 31 to S3 and key information reading line Do-D
The key information reading line DO-7D1.5 reads the on/off information of the switches 1 to 5-48 arranged at the intersection with the key information reading line DO-7D1.5.

In this way, in the past, even if the number of keys of the same type were the same, different keyboards had to be used if the number of bits of the data buses of the connected data processing circuits differed.

Purpose of the Invention The present invention improves these conventional drawbacks, and
The purpose is to provide a keyboard that can be used for both a 2N-bit M-scan type keyboard and an N-bit 2M-scan type keyboard.

Embodiment of the invention FIG. 3 is an explanatory diagram of the configuration of an embodiment of the invention, and 8(N)
A first key matrix having a book's first key information i reading line Do-D7 and 3 (M) first scan lines 31-33, and 8 (N) second key information reading lines. Line D8~
D15 and a second key matrix having 3 (M) second scan lines 34 to S6 are formed on the same substrate BD. Note that SWI to 5W24 are the switches of the first key matrix, and 5W25 to 5114B are the switches of the second key matrix.
is each switch in the key matrix.

FIG. 4 shows a state in which the keyboard of FIG. 3 is used as a 16-bit 3-scan type keyboard and applied to a data processing device having a 16-bit data bus. In the same figure, connectors TSI to TS provided on the board BD
6. TDO to TD15 are scan lines S1 on the substrate BD
~S6. This is to connect the key information reading line DO-D15 and the signal lines s1 to s6+dO to d15 on the data processing device UNIT, and the signal line s1 and the signal line s4, the signal line s2 and the signal line s5, and the signal line S3. and signal line s6 are mutually connected by printed wiring, and the driver DRI-DR3
connected to the output of

Further, the signal lines dO to d15 are connected to each bit of a 16-bit data bus BUS via DR4 to DR20.

Therefore, by sequentially inputting scan signals to the drivers DRI to DR3, key information can be read through a total of 16 signal lines, and a 16-bit 3-scan type keyboard can be realized.

FIG. 5 shows a configuration in which the keyboard of FIG. 3 is used as an 8-bit 6-scan type keyboard and applied to a data processing circuit having an 8-bit data bus. In this case, signal line dO and signal line d8, signal line di and signal line d9
, .--The signal line d7 and the signal line d15 are connected by printed wiring, and connected to each pin of the 8-bit data bar and XBUS' via driver drivers DRI to DR8. In addition, the signal lines 31 to s6 are connected to DRI-DR3, DR21-DR23.
Connect to the output of With this configuration, by sequentially inputting scan signals to drivers DRI to DR3, DR217, and DR23, key information can be read through a total of eight signal lines, making it possible to obtain an 8-bit 6-scan keyboard. can be realized.

In addition, the intersection point P of the dashed-dotted line X and the signal line in FIGS. 4 and 5
The data processing device 11NIT section up to the point 11 is configured as a printed wiring board, and a connector is provided at the intersection point P.1. Knee (D connector Ts1~Ts6., TDO-TDl
, 5 may be connected by a cable.

FIG. 6 is a configuration explanatory diagram of another embodiment of the present invention, and FIG.
A switch A is provided between the scan lines 81 to s3 and the scan lines 84 to S6 in the figure, and a switch Bt- is provided between the key information reading lines DO to D7 and the key information reading lines D8 to D15.
When using it as a 16-bit 3-scan type keyboard, open the pre-I/5-A and select the
If you close the switch and use it as an 8-bit 6-scan keyboard, all you have to do is close the switch and switch A and open the switch. In addition, in the case of 16-bit 3, scan method, connectors TS4 to TS6 are not used, and scan and signals are input to connectors TSI to TS3, and connector T
It connects DO to TD16 to the data bus. In addition, in the case of the 8-bit 6-scan method, the connector TDO ~
TD16 is not used, a scan signal is input to connectors TSI-TS6, and connectors TDO-TD7 are connected to a data bus.

Although the above embodiments have shown configurations applicable to 8-bit and 16-bit data buses, the keyboard of the present invention generally has N first key information reading lines and M first key information reading lines. A first key matrix having scan lines and a second key matrix having N second key information reading lines and M second scan lines are formed on the same substrate. This allows connection to N-bit and 2N-bit data buses.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a first key information reading line having N first key information reading lines and M first scanning lines is provided.
This key matrix and a second key matrix having N second key information reading lines and M second scan lines are formed on the same substrate, and simple connection changes are possible. By simply doing this, it can be used as a 2N-bit M-scan type keyboard or an N-bit 2M-scan type keyboard, and can be used with two types of data processing devices that have N-bit and 2N-bit data buses. There are advantages.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the configuration of a conventional keyboard;
The figure is an explanatory diagram of the configuration of an embodiment of the present invention, and FIG. 4 shows a state in which the keyboard of FIG. 3 is used as a 16-bit 3-scan keyboard and applied to a data processing device having a 16-bit data bus. 5 shows a state in which the keyboard of FIG. 3 is used as an 8-bit 6-scan type keyboard and is applied to a data processing device having an 8-bit data bus, and FIG. 6 shows another example of the present invention. FIG. 2 is a configuration explanatory diagram of an embodiment. 81 to S6 are scan lines, Do to D15 are key information reading lines, and S-0 to 5W4B are switches. Patent applicant FANUC Co., Ltd. Representative patent attorney Hisaku Tamamushi 1 person outside the department No. 10 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A first key matrix having N first key information reading lines (DO to D?) and M first scan lines (St to 33), and N second key information reading lines. (D8~
D15) and a second key matrix having M second scan lines (34 to S6) are formed on the same substrate.