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    • 2. 发明专利
    • KEY INPUT DEVICE
    • JPH03246712A
    • 1991-11-05
    • JP41862690
    • 1990-12-12
    • CASIO COMPUTER CO LTD
    • SUENAGA HISAFUMI
    • G06F3/02
    • PURPOSE:To quickly execute the processing corresponding to a specific key by providing a control means for allowing an input buffer to write key code data of the specific key in the head position of the input buffer, when a discriminating means 14 discriminates its specific key. CONSTITUTION:A key input device 11 is entirely independent from various processings of a main body device 12 and executes the processing for writing successively its key code data in an input buffer 15 in accordance with a key operation of each key of a key input part 13, the key code data to a key input signal of each operating key of the key input part 13 is given to a discriminating means 14, and whether it is key code data of specific keys such as a printing release key, a paper feed key, a paper return key, etc., to which priority of the processing is high or not is discriminated. In such a state, at the time of the specific key, its discriminating signal is applied to a control means 16, its key code data is written in the head position of the input buffer 15, and also, written in a final position of the input buffer 15. In such a way, when the key code data of the printing release key is read in, the printing processing is stopped immediately, and the processing whose priority is high is executed quickly.
    • 4. 发明专利
    • POINTING DEVICE AND ITS CONTROL SYSTEM
    • JPH096531A
    • 1997-01-10
    • JP17814095
    • 1995-06-20
    • CASIO COMPUTER CO LTD
    • SUENAGA HISAFUMI
    • G06F21/20G06F3/033G06F3/038G06F15/00H04L12/28
    • PURPOSE: To allow this system to quickly deal with malfunction because of interference by radio transmitting conversion quantity information corresponding to prescribed input operation and the operation information of an operation key together with a 1st ID code and a previously set a 2nd ID code. CONSTITUTION: A CPU 34 in a cordless mouse 2 detects conversion quantity information or the operation information of an operation key, allows a check sum computing part 37 to inspect the existence of occurance of a data error and generate check sum data based upon ID code data constituted of plant ID code data to be a 1st ID code already stored in a transmission data storing table 33a and user ID code data to be a 2nd ID code and stores the check sum data in a transmission storing table 33a included in a RAM 33. The stored data are transferred to a transmission part 38, which modulates the transferred data to the carrier of an electromagnetic wave and transmits the modulated wave to a receiving part in a data processor. Thereby the system can quickly deal with malfunction by interference.
    • 8. 发明专利
    • FDD DATA SEPARATOR
    • JPH04134672A
    • 1992-05-08
    • JP25426290
    • 1990-09-26
    • CASIO COMPUTER CO LTD
    • SUENAGA HISAFUMI
    • G11B20/14H03L7/06
    • PURPOSE:To adjust the frequency of a window signal with a good accuracy by a simple circuit constitution without destroying the duty ratio of the window signal divided by 50% by providing a digital VFO consisting of a counter, a comparator, a signal generator and so on. CONSTITUTION:In the digital VFO, a comparator 3-12 compares an input value with an inversed result to have inverted the output bit of a counter 3-13, and a signal generator 3-15 generates and outputs a control signal corresponding to this compared result. And based on this control signal, the operation of the counter 3-13 is controlled. In this case, as the control signal, for example, two kinds of signals are outputted, one is the signal for reducing the cycle of the window signal, and the other is the signal for increasing the cycle of the window signal. Here, these signals are distributed properly in the one cycle of the window signal, and the duty ratio of the window signal is approximate to the 50%. Therefore, without destroying the duty ratio of the window signal divided by 50%, it is possible to adjust the frequency of the window signal by the simple circuit constitution with the good accuracy.
    • 10. 发明专利
    • DATA SEPARATOR FOR FDD
    • JPH04310675A
    • 1992-11-02
    • JP10341591
    • 1991-04-09
    • CASIO COMPUTER CO LTD
    • SUENAGA HISAFUMI
    • G11B20/14
    • PURPOSE:To control the oscillation frequency of a window signal and to quickly re-synchronize by considering even the period of a reading data signal besides the phase difference between the reading data signal and the window signal during the period of a sink field. CONSTITUTION:A phase comparing circuit 13-1 compares the phase difference between a reading data signal and a window signal. A period measuring circuit 13-2 measures the period of the reading data signal. A bias value generating circuit 13-3 corrects the input value inputted to a digital VFO 13-4 from the output result of the phase comparing circuit 13-1 and the period measuring circuit 13-2 and controls the oscillation frequency of the digital VFO 13-4. A window value comparing circuit 15-2 compares the level value of the window signal when the reading data signal is sent at this time and the previous level value held at a window value storing circuit 15-1. The digital VFO 13-4 makes the standard value into the input value based on the compared result.