JPH03232155A - Controller - Google Patents

Abstract

PURPOSE:To facilitate the setting of the control function and to integrate the circuits of the controller by selecting the control function is response to a stored data and activating only the selected control function. CONSTITUTION:A controller 1 consists mainly of an FDD (floppy disk drive) control LSI 1a and an EEPROM 1b being a storage means to select functions of the control LSIs 1a. The LSI 1a and the EEPROM 1b are mounted on a same printed circuit board and interconnected together. The EEPROM 1b stores a data to select the control function of an FDD device 2 comprising control circuit 5 and sets the control function of the FDD device 2 in the inside of the LSI 1a by a data in the EEPROM 1b. Thus, all or part of the control functions is set by using a data stored in the storage means, and the manufacture process is simplified and the circuit is integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device, and more particularly to a control device that is capable of performing multiple control operations on a device to be controlled, and that is capable of selecting a required control operation from among the multiple control operations. Regarding.

Conventional F'DD (floppy disk drive) technology requires the presence or absence of a READY signal, the form of data output (high level or low level when no signal is present), and the presence or absence of calibration (tracking of the head after power is turned on). (whether or not to perform the initial movement to the starting position), front L
Functions such as the lighting conditions of the ED (light emitting diode) are often changed to suit the needs of the customer who installs the device.

As shown in Figure 3, the main part of the conventional control device is implemented as a large-scale integrated circuit (LSI), and L and SI9 have several functions, and LS9 has a select terminal. The required function was selected by changing the connection of the select terminal 10 using a jumper wire 11 or the like on a printed wiring board (PCB).

Furthermore, since there are many functions to be set, if one LSI were to be used to set them, the number of select terminals would increase, so several LSIs were manufactured depending on the function.

Problems to be Solved by the Invention However, in conventional control devices, a control LSI is provided with a select terminal for selecting a function, and the function is selected by switching the connection of this select terminal. It is troublesome to connect the wires, and it requires a large number of select terminals, so it is necessary to provide a large number of terminals for connecting jumper wires to the PCB on which the control LSI is mounted, so the PCB becomes large. The number of select terminals that can be set on a control LSI is limited, and it is necessary to change the design of the LSI depending on the function, so the types of LSIs and PCBs on which they are mounted are increasing, and different assembly processes are required. There were problems such as the necessity of

The present invention has been made in view of the above points, and an object of the present invention is to provide a control device that allows easy setting of functions and unification of circuits.

Means for Solving the Problems The present invention provides a control device in which a desired control function can be selected from among a plurality of control functions, and a control device that operates a necessary control function among the plurality of control functions. and a control means for selecting a control function according to the data stored in the storage means and for operating only the selected control function.

The control function can be changed simply by changing the data in the action storage means, and only the control function according to the data in the storage means can be operated.

Example FIG. 1 shows a block diagram of a first embodiment of the invention.

Reference numeral 1 indicates a control device, and 2 indicates an FDD (floppy disk drive) device which is a device to be controlled. The control device l is mainly LSI (integrated circuit) la and LS for FDD control.
EEPR, which is a storage means for selecting the function of I1a
Consists of OMlb.

LSlla and EEPROMlb are mounted on the same printed wiring board (not shown) and are connected to each other. LSlla and EEPROMlb are on the printed wiring board.
In addition, external components for operating the LST 1 a and the EEPROM lb are mounted to form a control device.

The LSlla mainly consists of an oscillation circuit 3, a frequency dividing circuit 4, a control circuit 5, and a serial-parallel conversion circuit 6, and does not have an arithmetic function like a microcomputer or the like. An oscillator 7 is externally connected to the oscillation circuit 3. The oscillation signal of the oscillation circuit 3 is frequency-divided by the frequency divider circuit 4, used as a lock signal necessary for processing, and sent to the control circuit 5, serial-parallel conversion circuit 6, and EEFROM l external to the LSlla.
b. LSI1a and EEPROMlb are synchronized with this clock signal, and the EEPROM 1b performs data processing.
EPROMlb outputs data serially in synchronization with the clock signal from LSlla. EEPROMlb
Data for selecting the control function of the FDD device 2 by the control circuit 5 is stored.

Next, the operation of the device will be explained. First, when the power is turned on, a clock signal is sent from the LSlla to the EEPROM1.
b. In response to this clock signal, the EEPRO
Serial data is output from Mlb and input to LSlla. Therefore, LSlla only needs one terminal for function setting. EEPR input to LSlla
Serial data from OMlb is converted into parallel data by a serial-parallel conversion circuit 6 and supplied to a control circuit 5. The control circuit 5 sets the control function of the FDD device 2, which is the device to be controlled, according to this parallel data. The control operating conditions are not selected when the FDD power is turned on, and the CLOC is set when the power is turned on.
Data is started to be sent in synchronization with K and the control is set.

Further, data transfer from the EEPROM 1b to the Si 23 only needs to be performed - times when the power is turned on.

Furthermore, the data in the EEPROM 1b can be written by a computer or the like, and the data written in the EEFROM can be managed for each version, making management easier.

Also, for LSlla, EEPROMlb is LSI1
It is just a switch that determines the circuit connection in a,
No calculations or the like are performed using the data from EEPROM1b.

EEFROMlb stops operating after outputting the internal data to the header L811b. Furthermore, data can be written to the EEPROM 1b using write data and a write clock, and by writing data, it is possible to change the function within the LSI 1a.

In this way, the data in EEFROMlb allows LSL
It is possible to set the control function of the FDD device 2 inside the la, eliminates the need to connect many jumper wires, etc., and simplifies the manufacturing process. Furthermore, since there is no need for terminals for connecting jumper wires on the PCB, the PCB can be simplified and miniaturized.

In addition, by installing all the necessary functions in the LSlla and selecting the required functions from those functions using the EEPROMlb, the LSL1
la can be unified for all versions, and
Since it is possible to select functions by changing the data in the EEPROM 1b, it is possible to unify the wiring of the PCB and the process of assembling parts onto the PCB.

If you want to, you can measure the cost reduction. Additionally, since version control will be performed within the computer software (program), the LSI 1 aSPCB and assembly processes will be unified.

If it is done as shown in Figure 1, LS I 1 a and EEPR
Is the function set up separately from OMlb?
In terms of mounting on CB, as shown in Figure 2, EEPRO
By incorporating Mlb into the LSI 5, the mounting area is small, and a circuit for converting serial data to parallel data can be omitted, resulting in simplification and miniaturization. Furthermore, even with this configuration, the EEP
Since ROMlb can be electrically erased, its contents can be rewritten while it is installed, and even after it has been set to a certain version, it is possible to rewrite its contents and change it to another version.

Note that instead of using EEPROM as the storage means, a normal ROM may be used and inserted into the socket.

FIG. 3 shows a schematic configuration diagram of a third embodiment of the present invention. In the figure, the same components as in FIG. 1 are given the same reference numerals.

In this embodiment, the control function of the control LS I1a is selected by the data in the EEFROMlb, and the terminal T1 provided in the control LS11a is selected.
~T, for example, terminal T1.~T corresponding to the required control function. The control function can be selected by short-circuiting T2 to the power supply VcC using jumper wires J, , J2 (or a stop pin).

Therefore, EEPROM lb and jumper wire Jl,
It becomes possible to select the control function using both J2. For this reason, for example, for unnecessary control functions such as changes in function selection at the customer site where the control device is delivered, functions are selected using the EEPROMlb, and for those that need to be selected at the customer site, jumper wires are used. The configuration is selected according to the following.

With this configuration, the control functions that must be set at the time of delivery to the customer are EEPRO
Since it is sufficient to input data corresponding to the control function set in Mlb and set in EEFROMlb, productivity can be improved. In addition, the customer can easily set the functions by connecting jumper wires to correspond to the required functions as usual.

Furthermore, since the number of connection terminals for jumper wires for setting control functions can be significantly reduced, the control device can be downsized.

FIG. 4 shows a fourth embodiment, which is the same as the second embodiment shown in FIG. 2, but has a configuration in which some of the plurality of control functions shown in FIG. 3 can be set using jumper wires Jl and J2. It has the same effect as the third embodiment shown in FIG.

Note that the information written in EEPROMlb is FDD.
In addition to the function setting information 2, it is also possible to store control function settings such as filter constant settings for the signal processing system, as well as information such as model number.

Effects of the Invention As described above, according to the present invention, all or part of the control functions can be set using data stored in the storage means, and there is no need to connect jumper wires, etc., which simplifies the manufacturing process.
By unifying the circuits, productivity can be improved, equipment can be easily managed, component costs can be reduced, and the number of terminals for setting functions can be reduced, making the equipment more compact. It has the following features.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of a second embodiment of the present invention, FIG. 3 is a block diagram of a third embodiment of the present invention, and FIG. The figure is a block diagram of a fourth embodiment of the present invention, and FIG. 5 is a block diagram of a conventional example. 1... Control circuit, 1a... Control LSI, 1b...
EEPROM, 5...control circuit.

Claims (2)

[Claims] (1) In a control device in which a required control function can be selected from a plurality of control functions, a storage means in which data for operating a necessary control function among the plurality of control functions is stored in advance; A control device comprising means for selecting a control function according to stored data and operating only the selected control function. (2) Some of the plurality of control functions are set by the storage means according to claim (1) and means for operating only the control functions selected by the storage means, and some of the other control functions are A control device characterized in that the control function of the controller is configured to be set by changing wiring.