JPH0149080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control device used for a mask ROM.

Many remote control devices have been proposed in the past, and FIG. 1 is a block diagram showing one example of a remote signal transmitting device for a remote control device using a mask ROM that has been proposed in the past.

In FIG. 1, an oscillation circuit 1 outputs an oscillation signal with a frequency of ₀ , and its output is frequency-divided by a frequency divider circuit 2. Timing generator circuit 3 is frequency divider circuit 2
A key scan circuit 4 which inputs the frequency-divided signal from
An arbitrary timing signal is output to the data latch circuit 6, comparison circuit 7, and output control circuit 8. The key scan circuit 4 receives the timing signal and generates a scan signal for scanning the key switch group 11, the key switch signal from the key switch group 11 is decoded by the decoder circuit 5, the decoded signal is latched by the data latch circuit 6, and compared. It is supplied to the circuit 7. Comparison circuit 7 compares data from latch circuit 6 and decoder circuit 5. The multiple press detection circuit 9 detects multiple presses of the key switch group 11 via the decoder circuit 5 and supplies its output to the comparison circuit 7. The output of the comparison circuit 7 is supplied to the output control circuit 8. The output of the data latch circuit 6 is supplied to the mask ROM 12, and its output is supplied to the output control circuit 8. Output control circuit 8 is mask ROM
12 and outputs a remote control signal from terminal 10.

FIG. 2 shows the circuit configuration of the mask ROM 12.
m signals input from the data latch circuit 6 are taken into the address select 13. The output of the address select 13 is connected to a memory cell 14 which outputs each remote control signal, and each n output is connected to an output control circuit 8.

Next, the operation of the conventional example shown in FIGS. 1 and 2 will be explained. The oscillation signal oscillated at an arbitrary frequency of ₀ is 1/N
The frequency is divided by 1/N by the frequency dividing circuit 2, and a key scan signal is generated by the timing generator circuit 3 and the key scan circuit 4. This key scan signal is repeatedly output as key scan pulses of the same number or more than the number of keys used. One key scan cycle of Q key scan pulses is assumed to be M seconds. Key scan group 11
When the key switch 11 is scanned, a key scan signal corresponding to the operated key switch of the key switch group 11 is fed back to the decoder circuit 5. The key scan signal fed back to the decoder circuit 5 is converted into corresponding data and latched into the data latch circuit 6. After an arbitrary number of M seconds after this latch is completed, the same operation as described above is repeated, and the code circuit 5 further takes in data corresponding to the operated key switch. Then, the comparison circuit 7 compares the data latched in the data latch circuit 6 by the previous operation with the data obtained by the current operation. When a data match is detected, the output control circuit 8 sends a remote control signal to terminal 1.
Output from 0. The remote control signal is a transmission signal obtained by converting the data signal output from the mask ROM 12 onto radio waves by the output control circuit 8 so that it can be transmitted to the receiving device. The multiple press detection circuit 9 prohibits data comparison and inhibits the output of the output control circuit 8 when two or more keys of the key switch group 11 are arbitrarily heard at the same time, that is, when multiple keys are pressed. The remote signal output from the output control circuit 8 corresponds to the data of the mask ROM 12 selected by the output of the data latch circuit 6. Specifically, the outputs from the m data latch circuits 6 select the memory cells 14 that are input to the address select 13 of the mask ROM 12. The number that can be selected at this time is determined by the number of signals input to the address select 13 and is 2m. but,
The number of input and output data of the mask ROM 12 can be set to any number n since they do not correspond. Through this series of operations, the remote control device transmits a remote control signal corresponding to the operated key switch.

However, in conventional devices, mask ROM
Despite the use of , remote control signals could only transmit output modes, either continuous or single output.

The present invention improves this point and provides means for freely selecting the output mode using a mask ROM.

Before explaining the present invention, continuous output and single output of a remote control signal will be explained.

The remote control signal corresponding to the key switch is sent as an output code, but if the number of bits in the output code is R bits, continuous output of the remote control signal means that the R-bit output code is sent many times while the key is being pressed. It is output repeatedly. That is, if the time the key is pressed is S seconds and the time required to output an output code of R bits is T seconds, the output code will be transmitted S/T times. On the other hand, a single output of a remote control signal means that the R-bit output code is transmitted only once, and once it is output once, it is not transmitted after ST seconds, no matter how many seconds the key is held down.

In the conventional method where the remote control signal can selectively send either continuous output or single output, the remote control target is only used for switch-like operations such as turning the power on and off or switching reception channels. However, if it is necessary to perform continuous or step-by-step adjustments such as volume adjustment, sound quality adjustment, or image quality adjustment using a remote control, it is not possible.

The present invention provides a control device that can be sufficiently applied to volume control, etc.

The present invention is characterized in that together with transmission data corresponding to the operated key, data specifying whether the transmission data is to be output continuously or once is supplied to the output control circuit. That is,
The remote control device according to the present invention includes a memory circuit that has a plurality of address areas and stores transmission data and transmission output mode designation data in each of these address areas, and a memory circuit that stores transmission data and transmission output mode designation data in each of these address areas, and means for reading transmission data and transmission output mode designation data from the corresponding address area of the storage circuit; and an output control circuit that receives and outputs the read transmission data, and the output control circuit is configured to read transmission data and transmission output mode designation data from the corresponding address area of the storage circuit, The number of outputs of the transmission data is changed in accordance with the content of the readout transmission output mode designation data. Embodiments of the present invention will be described in detail below with reference to the drawings.

A block diagram of one embodiment of the present invention is shown in FIG. Functional parts that are the same as those in FIG. 1 are given the same numbers and their explanations will be omitted. The difference is the mask ROM
In addition to the first system that supplies the output of 12 to the output control circuit 8, the mask ROM 12 has an output mode
A second system is provided in which a ROM 15 is added and the output of the output mode ROM 15 is supplied to the output control circuit 8.

FIG. 4 specifically shows the mask ROM 12 and output mode ROM 15 shown in FIG. 3, and shows an embodiment of the output mode ROM 15 and its peripheral circuits. In Figure 4,
The mask ROM 12 has an address select circuit 13.
and a memory cell 14 for remote control signal data, which is a memory area created to store data to be transmitted, and further for selecting an output mode to determine the mode of transmission, continuous output or single output. It is constructed by adding an output mode ROM 15 which is a memory area created in 1, and the selection signal for address selection is connected to the output mode ROM 15 at the same time as the memory cell 14 for remote control signal data.

Next, the operation of this embodiment will be explained.

An oscillation signal oscillated at an arbitrary frequency _{of 0} is frequency-divided by 1/N by a 1/N frequency divider circuit 2, and a key scan signal is generated by a timing generator circuit 3 and a key scan circuit 4. Such a key scan signal is repeatedly output as a number of key scan pulses equal to or greater than the number of keys used. One key scan cycle of Q key scan pulses is assumed to be M seconds. When the key switch group 11 is scanned, the key scan signal corresponding to the operated key switch among the key scan signals is fed back to the decoding circuit 5. The key scan signal fed back to the decode circuit 5 is converted into corresponding data and latched into the data latch circuit 6. After an arbitrary period of M seconds, data corresponding to the key switch operated by the same operation as described above is further taken into the decoding circuit 5, and compared with the data latched in the data latch circuit 6 last time in the comparison circuit 7. When data matching is detected, the output control circuit 8 outputs a remote signal to the terminal 10. The multiple press circuit 9 prohibits data comparison and puts the output control circuit 8 into an output prohibited state when the key switch group 11 is pressed multiple times.

The remote control signal output from the output control circuit 8 corresponds to the data of the mask ROM 12 selected by the output of the data latch circuit 6. At the same time, the output control circuit 8 contains output mode data for determining whether to send the remote signal continuously or in one shot.
The output mode of the output control circuit 8 is determined by the ROM 15, and a remote control signal is output from the terminal 10. That is, in response to a signal from the data latch circuit 6, the address select circuit 13 selects the mask ROM.
When an address in ROM 12 is designated, an address in output mode ROM 15 is also selected correspondingly.
The output mode ROM 15 has memory cells 15-1 and 15-2 for specifying continuous output mode, and when a cell 15-1 or 15-2 is present at a selected address, remote signal data is sent to the output control circuit 8. At the same time, continuous output mode data is supplied, and the output from the terminal 10 becomes continuous output mode.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional example. Second
The figure shows an example of a conventional mask ROM and its peripheral circuits. FIG. 3 is a block diagram showing one embodiment of the present invention, and FIG. 4 is a diagram showing a specific example of a part of FIG. 3 and its peripheral circuit. DESCRIPTION OF SYMBOLS 1... Oscillation circuit, 2... Frequency division circuit, 3... Timing generator circuit, 4... Key scan circuit, 5...
Te code circuit, 6... Data latch circuit, 7... Comparison circuit, 8... Output control circuit, 9... Multiple press detection circuit, 10... Remote signal output terminal, 11...
Key switch group, 12...Mask ROM, 13...Address select circuit, 14...Remote signal data memory cell, 15...Output mode ROM.

Claims (1)

[Claims] 1 A memory circuit that has a plurality of address areas and stores transmission data and transmission output mode designation data in each of these address areas, and an address of the memory circuit that corresponds to the key operated in response to the operated key. comprising means for reading transmission data and transmission output mode designation data from the area, and an output control circuit for receiving and outputting the read transmission data,
The remote control device is characterized in that the output control circuit receives transmission output mode designation data read together with the transmission data and changes the number of times the transmission data is output according to the content of the data.