JPH08195569A - Printed board package insertion detecting circuit - Google Patents

Abstract

PURPOSE: To detect insertion of a printed board package to detect electric power turned on by installing a switch on the printed board package that is actuated when a lever at the front part of the printed board package is pushed down and detecting the insertion of the printed board package when the actuation of the switch is detected after the power is supplied. CONSTITUTION: A back wiring board 210 connects printed board packages 100 housed in a shelf 200. A switch 10, actuated by a lever 11 at the front of the printed board package 100, is provided. A power on reset circuit 20 outputs a signal when the printed board package 100 is inserted in the shelf 200 and electric power is turned on. An insertion detecting circuit 30 detects the insertion of the printed board package 100 and distinguishes it from the initial power on by detecting the activation of the switch 10 after the detection signal from the power on reset circuit 30 is sent out. Therefore, printed board package can be added or exchanged without stopping a system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board package insertion detection circuit in a non-stop system such as a communication system or an information processing system.

FIG. 9 is a diagram for explaining an example of a system configuration. Here, the system bus 300 is controlled (hereinafter CPU
Package) (referred to as PKG in the figure) 110, input / output control (hereinafter referred to as IOC) packages 121 to 1
2n, and power supply package (shown as POW in the figure) 13
In this example, 0 is connected, and a main memory package (denoted by MM in the figure) package 111 is connected to the CPU package 100.

FIG. 10 is a diagram for explaining an example of the printed board unit configuration. FIG. 10 shows a printed board unit 100.
0 indicates that the same type of printed board package as shown in FIG. 9 is accommodated in the shelf 200.

FIG. 11 is a diagram for explaining a method of inserting a printed board package. In the figure, 100 is a printed circuit board package on which a plurality of components P are mounted.
1 is provided. The shelf 200 is provided with a back wiring board 210 for connecting the terminals of the plurality of printed board packages 100 to each other, and a connector 220 is mounted thereon. 230 is a terminal of the connector 220.

A groove (slot) for guiding the insertion of the printed board package 100 is cut in the shelf 200, and the printed board package 1 is formed along the slot.
00, and when the printed board package 100 and the connector 220 come into contact with each other, the printed board package 100 is inserted into the connector 220 by tilting the lever 11 in the direction shown by the arrow, and the lever 11 moves. The lock mechanism operates in a vertical state to fix the printed board package 100 and prevent the printed board package 100 from falling off the shelf 200. As for the shape of the lever 11 and the structure for fixing the lever 11, various structures have been put into practical use,
Since it is not directly related to the content of the present invention, it will not be described in detail here.

In a system composed of such a plurality of printed board packages, when the printed board package is replaced due to a failure of the printed board package,
Alternatively, when an IOC package is added by adding a system function, it is required to add or replace the IOC package without stopping the system or turning off the power.

[0007]

2. Description of the Related Art For example, in the system configuration shown in FIG. 9, when a printed board package is added or replaced due to a failure, if the system is a personal computer, the system is stopped, the power is turned off, and then the print is performed. Boards are added, the system environment is changed, or the printed board package is replaced and then restarted.

FIG. 12 is a diagram for explaining an example of monitoring a conventional printed board package. As shown in the figure, when the power is turned on, the CPU package 110 is
Each mounting position of the shelf 200 is sequentially monitored, and the system state is grasped by looking into whether or not the printed board package is mounted and, if mounted, what its function is.

If such a look-in process is not performed, the operator changes the environmental data of the system.

[0010]

In the non-stop system of the duplex system, it is necessary to add or replace the printed board package without stopping the system.

Therefore, when one printed board package is inserted into the shelf while the system common power is being supplied, when viewed from the inserted printed board package, power is supplied to the own printed board package at the time of insertion. This is a problem that it is impossible to determine whether the common power source is turned on / off or the own printed board package is inserted.

When the common power source is turned on, C
Since the PU package 110 is also initialized and the CPU software looks up the printed board package at each mounting position to grasp the system state, notification from each printed board package is unnecessary.

On the contrary, when the insertion notices are sent from the respective printed board packages when the power is turned on, the insertion notices from the respective printed board packages to the CPU package 110 arrive at the same time when the power is turned on, and the processing of the CPU package 110 is performed. Can also be confusing.

The present invention includes insertion of a printed board package,
An attempt is made to realize a printed board package insertion notification circuit which can identify the common power-on and issue an insertion notification only when the printed board package is inserted.

[0015]

FIG. 1 is a block diagram for explaining the principle of the present invention. (B) shows the mounting state, 1
Reference numeral 000 denotes a system in which a plurality of printed board packages 100 are housed in a shelf 200 and the plurality of printed board packages 100 are connected to each other via a back wiring board 210.

(A) shows the principle of the present invention, and 10 is a lever 11 provided on the front surface of the printed board package 100.
A power-on reset circuit 20 that outputs a reset signal by detecting that the printed board package 100 is inserted into the shelf 200 and power is input, and 30 is a power-on reset circuit 2
When the operation of the switch 10 is detected after the detection signal of 0 is output, the insertion of the printed board package 100 is detected, and when the printed board package 100 is inserted and power is supplied, This is an insertion detection circuit that does not detect insertion, and by such means, it is possible to detect the insertion of the printed board package 100 and the power-on separately.

[0017]

When the printed circuit board package 100 is mounted on the shelf, the terminals of the printed circuit board package 100 are moved to the back wiring board 2 by tilting the lever 11 attached to the front surface of the printed circuit board package 100.
10 is inserted into the connector 220 and connected. At this time, the lever 11 also functions as a lock mechanism for mechanically fixing the printed board package 100 to the shelf 200.

In the present invention, the switch 10 operated by such a lever 11 is provided on the printed board package 100, and after the power is supplied to the printed board package 100 via the back wiring board 210, the operation of the switch 10 is detected. Only when it is detected as the insertion of the printed board package 100, the printed board package 1 is detected.
This is detected separately from power-on in the state where 00 is inserted.

[0019]

FIG. 2 is a diagram for explaining the generation of a power-on reset signal. When the printed board package 100 is inserted into the shelf 200 (not shown), the power Vcc and the ground E are supplied from the power package 130 (not shown) via the back wiring board 210 of the shelf 200, and the power-on reset circuit 20 is supplied. And outputs a reset signal that is output in a specified time width.

FIG. 3 is a diagram for explaining the switch operation of the embodiment of the present invention. (A) shows the switch operation, and the switch 10 is mounted on the printed board package 100, and the lever 11 provided on the front surface of the printed board package 100 is pushed down in the direction of the arrow, and when the insertion is completed, the switch 10 is turned on. Is set to work.

(B) shows the switch operation timing.
The insertion of the printed board package 100 is started at time t, and with the passage of time, the printed board package 100 is inserted.
The voltage applied to is increasing. The power-on reset circuit 20 monitors this voltage and outputs the power-on reset signal PR.
Generate ST. As the power-on reset signal PRST, a reset signal is output until a certain time elapses after the input voltage reaches the specified voltage. The switch 10 operates from "OFF" to "ON" after the end of the power-on reset signal PRST.

FIG. 4 shows an embodiment of the printed board package insertion detection circuit of the present invention. The resistors R1 and R2, the capacitor C, and the gates G1 and G2 form a power-on reset circuit 20, and the resistor R3, the gates G3, G4, and G5, and the delay circuit 12 are circuits that detect the operation of the switch 10.
A indicates “O” when the insertion of the printed board package 100 is detected.
N ”, and the insertion detection circuit 30 that outputs a LOAD signal
S-R flip-flop circuit (hereinafter referred to as S-RFF
It is called a circuit).

FIG. 5 shows a time chart of the embodiment of the present invention. (A)-(f) shows the waveform of each point of FIG. Vcc: When the insertion of the printed board package 100 is started,
The terminals of the printed board package 100 come into contact with the terminals 230 of the back wiring board 210, and power is supplied.

(A): The power supply voltage Vcc is divided by the resistors R1 and R2. Since the capacitor C is connected to the connection point, the potential rises gently. (B): It is the output of the gate G1, and the output becomes “OFF” when it becomes equal to or higher than the operating voltage of the gate G1.

(C): The output of the gate G2, which is the inverted output of the gate G1. SW: Indicates the operation of the switch 10, and changes from “OFF” to “ON” after the reset period ends.

(D): This is the output of the gate G3 and outputs "high" by the operation of the switch 10. (E): The output (d) of the gate G3 is td by the delay circuit 12.
It is the output delayed by only the above and inverted by the gate G4.

(F): This is the output of the gate G5 which is composed of a NAND circuit which receives the output (d) of the gate G3 and the output (e) of the gate G4 as input, and both (d) and (e) are "high". Is an output that becomes "low".

LOAD: S-RFF in which the output (f) of the gate G5 is the S input and the output (c) of the gate G2 is the R input
This is the output of the circuit 30A, which is set at the falling edge of (f) and outputs the load signal (insertion detection signal) "high".

When the power is turned on with the printed board package 100 inserted, the switch 1
Since 0 remains “on” and the signal (f) does not change, the LOAD signal remains “off”, and insertion detection is not performed.

Thus, although the LOAD signal is output when the printed board package 100 is inserted,
No output is made when the power is turned on while the printed board package 100 is inserted, so that the two cases can be distinguished and distinguished.

FIG. 6 shows an example of slot position information allocation of the printed board package according to the embodiment of the present invention. In this embodiment, the specified terminals of the back wiring board 210 are common to all the printed circuit board packages 100.
It is assigned as slot position information.

(A) shows an example of shelf mounting, in which the printed board packages 101 to 108 are mounted on the shelf. (B) is a terminal for displaying the slot position,
Three terminals T1 to T3 are assigned, and the slot positions are identified by grounding or opening each terminal according to each slot position.

FIG. 7 is a diagram for explaining the insertion / ID notification circuit of the embodiment of the present invention. 110 is a CPU package, 11A central control unit, 11a is an ID reading processing unit,
11B is an insertion notification register, 11C is an interrupt controller, 11D is an address identification circuit, 11E is a gate,
1F is an internal bus and 12i is an IOC package.
2A is a microprocessor (indicated as MPU in the figure), 12
B is an ID register, 12C is a power-on reset circuit,
12D is a slot position identification circuit, 12E is an S-RFF circuit, 12F is a gate, and 12G is an internal bus.

In the figure, the CPU package 110 is provided with an insertion notification register 11B for receiving an insertion notification, and when the insertion notification signal is received, the slot information of the IOC package 12i which issued the insertion notification signal is written.

After writing the insertion notification signal, the insertion notification register 11B notifies the interrupt controller 11C that the insertion notification signal has been received, and the interrupt controller 1C is notified.
Interrupt signal (INT) from 1C to central controller 11A
To issue.

In the input / output control package 12i, the slot position identification circuit 12D for reading and identifying the states of the terminals T1 to T3 described in FIG. 6 and the ID register for writing the type information of the input / output device such as the printer and the disk are written. 12
It has B.

The output of the slot position identification circuit 12D passes through the system bus 300 and the CPU package 110.
Whether the order etc. accessed from is for yourself,
It is also used as an address for determining whether or not it is used for determining whether or not to pull the system bus 300 into the internal bus of its own package.

FIG. 8 shows a flow chart of ID notification according to the embodiment of the present invention. The operation will be described below according to the steps of the flowchart (hereinafter referred to as S). First, the input / output control package (shown as IOCPKG in the figure) #i is inserted.

S1: When the input / output control package #i is inserted, the power-on reset circuit 12C described with reference to FIG.
Operates to reset the inside of the IOC package 12i. S2: The MPU 12A of the IOC package 12i is activated from the initial state by the power-on reset signal.

S3: The MPU 12A performs internal initialization, and after a certain period of time elapses, reads the LOAD signal output from the S-RFF circuit 30A. S4: It is determined whether or not the read LOAD signal is "ON".

S5: When the LOAD signal is "ON", the slot position identification circuit 12D reads the slot position information. S6: This is sent to the CPU package 11A as data via the system bus 300, and the slot position information is written in the insertion notification register 11B.

S7: When the CPU package 110 writes to the insertion notification register 11B, it interrupts the central controller 11A via the interrupt controller 11C (I
NT), and the central controller 11A identifies the interrupt factor by reading the interrupt bit of the interrupt controller 11C.

S8: In this embodiment, the central control unit 11A
Is identified as an insertion notification, the insertion notification register 11B is read to identify the inserted slot position. S9: ID reading processing unit 11 of CPU package 110
a is the ID register 1 of the inserted IOC package 12i with the read slot position information as part of the address.
2B contents are read via system bus 300, and ID
Get information.

S10: If the LOAD signal is not "on" even though the IOC package 12i is inserted in S4, the process returns to the initial state. The CPU package 110 that has input the ID information in S9 performs a system change process by software processing.

By the above processing, after the insertion detection notification, the ID
The notification allows newly added or replaced printed circuit board packages to be incorporated into the system while performing on-line processing.

[0046]

According to the present invention, it is possible to distinguish the insertion of the printed board package from the power-on, and when adding a system function or the like online, C
The PU package need only wait for the notification from the printed board package to be inserted, and the circuit for monitoring the insertion of the printed board package, the look-in process, etc. can be eliminated, and the system can be changed efficiently. It is possible to add a system.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the principle of the present invention.

FIG. 2 is a diagram illustrating generation of a power-on reset signal.

FIG. 3 is a diagram illustrating a switch operation according to an embodiment of the present invention.

FIG. 4 is an embodiment of a printed board package insertion detection circuit of the present invention.

FIG. 5 is a time chart of an example of the present invention.

FIG. 6 is an example of slot position information allocation of the printed board package according to the embodiment of the present invention.

FIG. 7 is a diagram illustrating an insertion / ID notification circuit according to an embodiment of the present invention.

FIG. 8 is a flowchart of ID notification according to the embodiment of this invention.

FIG. 9 is a diagram illustrating an example of a system configuration.

FIG. 10 is a diagram illustrating an example of a printed board unit configuration.

FIG. 11 is a diagram illustrating a method for inserting a printed board package.

FIG. 12 is a diagram illustrating an example of monitoring a printed board package of a conventional example.

[Explanation of symbols]

 1000 printed board unit 10 switch 11 lever 12 delay circuit 20 power-on reset circuit 30 insertion detection circuit 30A, 12E S-RFF circuit 100, 101-108 printed board package 110 CPU package 111 MM package 11A central control unit 11a ID reading processing unit 11B insertion notification register 11C interrupt controller 11D address identification circuit 11E, 12F, G1 to G5 gates 11F, 12G internal bus 121 to 12n IOC package 12A MPU 12B ID register 12C power-on reset circuit 12D slot position identification circuit 130 POW package 200 shelf 210 Back wiring board 220 Connector 230 T1 to T3 terminal 300 System bus R1 to R3 Resistance C Capacitors P parts

Claims (3)

[Claims] 1. A printed circuit board unit for accommodating a plurality of printed circuit board packages and a power supply package, wherein the plurality of printed circuit board packages is supplied with power from the power supply package via a back wiring board. A switch operated by a lever provided on the front surface, a power-on reset circuit that outputs a reset signal by detecting that the printed board package is inserted into the shelf and power is input, and a detection signal of the power-on reset circuit When the operation of the switch is detected after being output, the insertion of the printed board package is detected, and when the printed board package is inserted and power is supplied from the power supply package, It is characterized in that an insertion detection circuit for non-detection of insertion is provided. Printed circuit board package insertion detection circuit. 2. The printed board package insertion detection circuit according to claim 1, further comprising a slot position identification circuit for identifying a slot position of the inserted printed board package, wherein the printed board package is inserted, and the output of the insertion detection circuit is inserted. 2. The printed circuit board package insertion detection circuit according to claim 1, wherein the insertion position of the printed circuit board package is identified by the slot position identification circuit and the result is notified to the control package when is sent. 3. The printed board package insertion detection circuit according to claim 1, further comprising an ID reading processing unit that reads ID information of the inserted printed board package when the control package detects an insertion notification. 2. The printed circuit board package insertion detection circuit according to claim 1, which is characterized in that.