JPH0363808A - Time data reader - Google Patents

Abstract

PURPOSE:To output intermittent time data after converting to continuous time data by providing a storage means which fetches time data from a clock LSI and stores it corresponding to a synchronizing signal outputted synchronized with a timing with which effective time data is outputted from the clock LSI. CONSTITUTION:The microcomputer 2 of a working device performs the setting of an initial value PSV on the clock LSI 3 via a register 5 at a time when a time data reader 1 in initialized. When the initial value PSV is set, the clock LSI 3 outputs the time data after the initial value PSV. A read register 10 stores the intermittent time data TD outputted from the clock LSI 3 as the continuous time data, and the microcomputer 2 of the working device 20 reads the time data in parallel and outputs it to external equipment. In such a way, it is possible to output the intermittent time data TD outputted from the clock LSI 3 as the continuous time data without having a break.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a one-time data reading device, particularly a one-clock LSI.
This invention relates to a device that converts time data that is intermittently outputted by the system into continuous time data that is continuous and outputs the converted time data.

[Prior Art] A clock LSI outputs time data consisting of data for each time element such as year, month, day 1:00, minute, second, etc. according to a predetermined clock timing. The time data output from the LSI is read by a device using a microcomputer and used for displaying the time and other appropriate purposes.
The timing at which time data is output by I is as shown in FIG. There is an update period PB, and time data TD is not output during this update period PB. Therefore, the clock LSI repeatedly outputs time data intermittently.

[Problems to be Solved by the Invention] As described above, since the time data TD is outputted intermittently from the clock LSI, it has been impossible to output the time data TD of a single clock LSI as uninterrupted continuous data. . That is, on the side of the device using the 5-clock LSI, sampling of the time data TD is performed in synchronization with the timing at which the valid time data is output by the clock LSI.

It was necessary to consider this in the program.

Therefore, one object of the present invention is to provide a time data reading device that can output time data that is intermittently output from a clock LSI as continuous time data.

[Means for Solving the 11 Problems] In order to achieve the above object, the time data reading device according to the present invention (1) responds to a synchronization signal outputted in synchronization with the timing at which valid time data is outputted from the clock LSI. te1
By providing a storage means for capturing and storing time data from a clock LSI, intermittent time data is converted into continuous time data and output.

[Operation] When a synchronization signal synchronized with the timing at which valid time data is output by the clock LSI, the storage means takes in and stores the time data from the clock LSI in accordance with the synchronization signal.

In this way, the storage means converts the intermittent time data output by the clock LSI into continuous time data. In the time data reading device according to the present invention, the data converted into continuous time data by the storage means is read by a microcomputer or the like and outputted to the outside in one or more ways.

Intermittent time data output by a clock LSI can be output as continuous time data.

Furthermore, since the storage means captures time data in response to a synchronization signal issued from the clock LSI, sampling of the time data is performed in synchronization with the timing at which valid time data is output by the clock LSI. , there is no need to consider it in the program.

[Examples] Hereinafter, the present invention will be described in detail based on examples shown in the accompanying drawings.

In FIG. 1, a microcomputer 2 of a utilization device 20 is connected to a clock LSI 3 via a register 5 at the time of initializing a time data reading device 11 according to the present invention.
An initial value PSv is set for .

When the initial value PSv is set in this way, the clock LSI 5 will set the initial value PSv at the timing shown in FIG. 2(a).
Time data after the initial value PSv will be output. That is, before each valid data output period FA, there is a data update period PB in which no valid time data TD is output. Also.

The clock LSI 3 outputs an update end pulse UCP at the end of each data update period FB (FIG. 2(b)).
reference).

In ROM6, for example, one year has passed since clock LSI3.

A time request address designation A for reading data for each time element of "1 hour, 1 minute, 1 second of the first day of the month" is stored for each time element.

When the update end pulse UCP issued from the 1-clock LSI 3 is input, the read control unit 7 first sends the time request address TDA- for the 1 year time element to the ROMB.
Specify the predetermined address where Y is stored. ROM
6 transmits the time request address TDA-Y for the “year” to the clock L according to the address specification by the read control unit 7.
Output to SI3. In the clock LSI 3, the year data YD regarding the "year" time element is sent to the clock register 8 via the data bus 15 according to the time request address TDA-Y.
Send to. In this way, the clock register 8 latches the year data YD by the time element data set pulse 5P-A input from the read control section 7.The read control section 7 then latches the year data YD.

The address in which the time request address TDA-M for the "January" time element is stored is specified in the ROM 6. In this way, the ROM 6 outputs the time request address TDA-M for "month" to the clock LSI 3, and
At SI3, monthly data MD is sent to the clock register 8 according to the time address TDA-M. In this way,
In the clock register 8, the data set pulse 5P-A
The monthly data MD is latched by . Hereinafter, the read control unit 7 uses the time request addresses TDA-D and TDA-H for the time elements "1 day", "hour", "minute", and 1 second, respectively.
, TDA-MI, and TDA-8, the daily data DD, hour data HD, minute data MID, and second data SD are sequentially latched into the clock register 8 using the procedure described above. Ru. the result,
The clock register 8 contains data of all time elements at one point in time immediately after the update end pulse UCP, that is,
Clock data TD is latched. The read register 10 latches the time data TD at one point in time latched by the clock register 8 in response to a time data set pulse 5P-B input from the read control section 7. In this way, the intermittent time data TD output by the clock LSI 3 is stored in the read register 10 as continuous time data. The microcomputer 2 of the utilization device 120 reads the time data TD latched in the read register 10 in parallel and outputs it to an external device.

Hereinafter, with reference to FIG. 2, the time reading device [1] according to the present invention will be described.
An example of the operation will be explained.

When the update end pulse UCP is input from the clock LSI 3 as shown in FIG. In this way, the time request address TDA-Y of is output (FIG. 2(c)).

The year data YD is read from the clock LSI 3, and the year data YD is latched into the clock register 8 (FIG. 2(d)'
), hereafter, from ROM6 "January", "1st", "hour", "1 minute"
, 1 second", each time address TDA-M
, TDA-D, TDA-H, TDA-MI, TDA-8
are sequentially output, month data MD, day data DD, hour data HD, and minute data MID are output from the clock LSI3.
and seconds data SD are read and sequentially latched into the clock register 8. Note that the ROM 6 outputs all the time addresses within a predetermined time after the clock LSI 3 outputs the update end pulse ucp.

That is, it is performed within the valid data output period PA immediately after the update end pulse UCP.

In this way, when the clock data TD immediately after the update end pulse UCP is latched in the clock register 8, the data TD is latched in the read register 10 (FIG. 2(a)). The time data TD latched to 10.

It will be read in parallel by the microcomputer 2 of the utilization device 20.

Hereinafter, in this device 11, the above-described operation is repeated every time the update end pulse UCP is input from the 1-clock LSI 3.

In addition, the above-mentioned device used! This is because the 20 microcomputers 2 always read the continuous time data TD latched in the read register 10.

The intermittent time data TD outputted by the clock LSI 3 with a data update period PB in between is output as continuous time data without any breaks.

[Effects of the Invention] As described above, the time data reading device according to the present invention converts the time data taken in from the clock LSI into continuous data, so that the time data reading device according to the present invention converts the time data taken in from the clock LSI into continuous data. This has the effect that data can be output as continuous time data without any breaks. Also, watch L
Since the time data is taken in according to the synchronization signal issued from the SI, there is no need to consider in the program that the time data is sampled in synchronization with the timing at which valid time data is output by the one-clock LSI.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a time data reading device according to the present invention, and FIG. 2 is a time chart illustrating an example of the operation of the device. 6... ROM, 7... Read control unit, 8... Clock register, 9... Read register.

Claims (1)

[Scope of Claims] A time data reading device for reading time data provided from a clock LSI, wherein the clock LSI intermittently repeatedly outputs time data and determines the timing at which valid time data is output. This time data reading device outputs a synchronization signal in synchronization with the synchronization signal, and is equipped with a storage means for capturing and storing time data from a clock LSI in response to the synchronization signal, and converts intermittent time data into a continuous one. A time data reading device characterized in that data converted to time data is output from the storage means.