JPS59133661A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make a switch unnecessary, by processing a part of a feedback signal as an extraordinary operation switching signal and switching the logic to an extraordinary operation to eliminate the trouble of switching of the switch or the like. CONSTITUTION:A control circuit 5 constituted with a one-chip microcomputer, a resistance 7 which pulls up the signal line connected to the feedback signal of an interface connector 6 to a power source voltage 8, and an external control circuit 9 for the extraordinary operation are provided. The circuit 5 is provided with an input/output port which can be used as a port OUT as well as a port IN, and the input/output port is constituted with an FET 10 and DFF 11, and the drain of the FET 10 is grounded, and the source is connected to a D input of the FF 11. When this circuit is used as the port IN, the FET 10 is turned off to read by a program. In case of the ordinary operation, the FET 10 is turned on and is grounded, and the circuit is operated for the feedback signal, and it is discriminated whether the extraordinary operation should be performed or not.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention tr:K relates to a magnetic recording/reproducing device that carries a plurality of feedback signals in a part of an interfuniform connector.

Conventionally, as shown in FIG. 1 of the fB magnetic recording/reproducing apparatus, the control circuit 1 usually has @saku and Uil! i1 Equipped with a switch 2 that determines non-normal operations such as distortion operation and test operation. The external control circuit 4 for controlling or controlling the abnormal operation is connected to the interfunis connector 37.
<There are 11 threads along the A diameter. During adjustment, the control circuit 1 is switched to non-normal operation using the switch 2, and the external control circuit 4 for adjustment is connected.

In order to reduce the size during the adjustment process and damage to the connector? In order to reduce the amount of time required, the external control circuit 4 for adjustment is not removed at the end of adjustment 1. Also, the switch 2 does not have to be switched during adjustment, and the adjustment distortion switch 2 can be turned off. Therefore, in order to perform non-normal operations such as adjustment, after connecting the external control circuit to the external control circuit 4-cane interface connector B, switch 2.
Switches and switching operations, such as switching to non-normal operation, serve as a core wall in addition to connecting the external control circuit 4.

The present invention has been made in order to completely eliminate the above drawbacks.

An example of misfire 1 and light will be explained with reference to FIGS. 2 and 3 and Table 1.

Control circuit 5 composed of a 1-chip microcomputer
(!: Resistor 7 for pulling up the signal line connected to the feedback signal of interface connector 6 to the total power supply voltage 8
In the configuration of the external control circuit 9 during non-normal operation, the control circuit 5 is composed of a 1-chip 4-bit microcomputer, and a 5-inch floppy disk interface will be briefly explained. A Q-MOS, 1-chip 4-bit microcomputer has an input/output port that can be changed once as an OUT port and an N port, and is configured as shown in Figure 3.F]1nT10 and D In the configuration of flip-flop 11, the drain of +'KT10 is grounded and the source is connected to the D input of D flip-flop 11.When used as an IN port, FET10'kO
You can FF it and read it with a program. By connecting this to a in Figure 2, this signal line becomes electrically
Read whether it is at H level immediately after the power is turned on, and during normal operation, turn on FET11i and ground it to fulfill the original purpose of the RETURN signal. However, it is possible to make a judgment as to whether the sword is in abnormal operation. Table 1 shows the relationship between the signals and bin numbers of the 5-inch floppy interface connector, and the odd numbered pins are RETtJR.
Since it is an N signal, no electrical problem will occur even if one circuit is used as a non-normal operation switching signal. therefore,
1 of the RETURN signal in the external control circuit 9 during non-normal operation.
By not setting the non-normal operation switching signal to the keto level, it is possible to switch between non-normal operation and normal operation. 7. The change switch becomes uncomfortable. In the above explanation, a 1-chip 4-bit microcomputer was used, but other microcomputers may be used.

In addition, the logic circuit handles the non-normal operation/normal operation switching No. 16 as a logic signal, and switching the logic is incomprehensible.

Further, although the explanation has been made using a 5-inch floppy interfnis, other magnetic recording/reproducing device interfniss may be used.

As described above, according to the present invention, 1. RETUR, N signal 1
By processing the part as a non-normal operation switching signal, it is possible to switch the logic to non-normal operation without affecting the conventional interface. After connecting the external control circuit, the type of external circuit can be changed. can be determined, eliminating the need for switches and the hassle of changing switches.

people 1

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the entire conventional magnetic recording main device. FIG. 2 is a diagram for inventing an embodiment of the value record drawing device of the present invention. FIG. 3 is a diagram for explaining the entire input/output common board of the microcomputer. 1...Control circuit 2...Switch 6.6...Inter 7 S connector 4.9...External control circuit 5...Control circuit 7...Resistor 8...Power supply voltage 10... F F, T 11...D flip frog 21'hi 3 tm 4071

Claims (1)

[Claims] In a magnetic recording and reproducing device that sends a plurality of feedback signals to a part of the interface with an external control circuit that controls the magnetic recording and reproducing device, normal operation is achieved by processing the feedback signals as non-return signal lines. It is necessary to distinguish between normal operation and non-normal operation.