JPS58200492A - Magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To restart any operation once stopped easily and surely with a simple constitution, by using a memory chip storing anddetecting the internal state of the memory chip. CONSTITUTION:Position information and memory address information loops 10,11 provided with bubble detectors 13,14 and the like, the same as major and minor loops 3,2 of the memory chip 8 are formed on a state display chip 9. This loop 10 is provided with a position 12 on which a bubble is transferred via a transfer gate controlled synchronizingly with the chip 8, and the transfer of bobble with the loop 10 is synchronized with the transfer between the loops 2 and 3. Thus, when the detector 13 detects the bubble transferred on the loop 10 in response to the rotating magnetic field at the restart after the power supply interruption, the position information of the loop 3 is obtained and the loop 3 is initialized. When no output exists in the detector through this circulation, it is confirmed that no buble is transferred to the loop 2. This is the same for the address information via the loop 11, and the restart after operation stop is done easily and surely.

Description

[Detailed description of the invention] The present invention is based on four methods for making snow by magnetic paplume printing.

Magnetic bubble memory storage is a non-volatile memory that stores binary signals based on the presence or absence of moldy magnetic domains (bubbles) within the substrate. A method is used in which the direction of magnetization of a soft ferromagnetic thin film is changed to Y using a rotating magnetic field, and the bubbles are transferred and calculated. Such a method is called a field access method, and a main-minor loop structure is often used as the circuit structure within the memory chip. A large number of these memory chips are assembled to form a module, and the bubbles are transferred under the same rotating magnetic field.

This book Ij# is related to the above-mentioned Hojo's magnetic bagurmet electric manufacturing, and is a book that attempts to provide a method that can detect the internal state of a memory with high reliability.

FIG. 1 is a schematic diagram illustrating the structure and function of major-minor looses in the field access method.

The circle 1 in loop 2.5 of 211i11 represents the position of a magnetic bubble, and information is stored depending on the presence or absence of a magnetic bubble at each address in loop 2, which is called a minor loop. The applied magnetic field is transferred sequentially as the magnetic field rotates, and when the desired address reaches the top of the minor loop in the diagram, the transfer gate 4 is transferred.
is transferred to major loop 3 via . Similarly, in the major loop 5, a rotating magnetic field is transferred in the direction of the arrow in the figure, and a detector 5 detects the presence or absence of bubbles, an extinguisher measures the number of bubbles, and a generator 7 generates 6% bubbles. Then, data is sent to the outside and data from the outside is taken in. It is transferred again within the major loop by the rotating magnetic field, and when it returns to its original position, it is transferred to the 'transfer gate #1ll#t4' loop. When the magnetic puzzle goes around the major loop and is transferred to the minor loop again, the number of bidats in the major loop and minor loose are adjusted so that the address in the minor loop matches the one taken out at the beginning. It's official. Transfer between the minor loop and the major loop is performed by opening and closing the tag gate of the transformer 7 based on an external signal, and the information on the address of all the minor loops hanging from the bell major loop is transferred to the major loop at the same time. The process is carried out all at once, after being sent to the ridge, then transferred to the minor loop again.

The magnetic bubble memory exchanges information with the outside using the above-described method. A module consisting of a large number of memory chips is shown above.

The transfer r# is carried out for #1 seconds with one memo exchange chip at a time, and the management of these transfers is done by each memory chip henotransfer (l no. - This is done by means of a control signal RK of a rotating magnetic field applied to the entire ring.

In addition, to represent the operating state of the memory chip at each point in time,
Used as a sign to describe a minor loose condition.

1 Using the "memory address", one memory chip is selected in the module and the information is sent to the major loop. use

Magnetic bubble memo IJ! In order to know the operating status of Ill [tj
I have already mentioned that two items, "memory address I" and "location information 1," are required, but all transfers within each memory chip of the module are performed synchronously. As long as it is adjusted, the memory addresses in the memory chip of Spe τ will match.

In addition, the number of magnetic bubbles selected in the module and sent from the minor loop to the major loop is at most one, and in order to represent this state of expansion, the selected memory chip must be one. If you know the number and three values from 0 to 3 that require position information, you can know the internal status of all memory chips in the module.

The first question is how to understand the internal state of a magnetic puzzle memory device, which occurs when a magnetic puzzle memory device, which is a type of non-volatile memory, is put into practical use. In other words, when the power is turned off and turned on again due to an unexpected accident, the 9 magnetic bubble memory scissors f1w that is embedded in the KIi11 in the device may be damaged. It is essential to know the internal shape of the memory phonograph - memory address and position information. When the power is turned on again, or when loading a cassette, it is difficult to access the bubble properly unless the internal state is known. It is necessary to assume that the power supply is in a typical situation where a single memory chip is used to transfer information to the major loop. Unlike semiconductor memory, where addresses are determined by hardware, magnetic bubble memory addresses can be said to be volatile.

Conventionally, as a solution to these problems, the magnetic bubble was transferred to a special initial state using the Pacto1p's power supply even when the power was down, and when the power was turned off, the 11K internal state was the same. There is a method that allows the bubble to stand still rather than stand still, or a method that sacrifices some of the information space inside the bubble and inserts a special information pattern to reveal the internal state when the power is turned on again. .

Although Gowara's solution seems to be able to perform its function sufficiently if it is not used properly, the present invention is intended to provide an 11-degree higher solution in addition to these. The basic idea is that the magnetic paplume memory as a non-volatile memory should not only retain information when the power is turned off, but also retain its internal state in a non-volatile manner. This is frustrating.

The magnetic bubble memory *flK according to the present invention will be explained in detail below.

FIG. 2 is a schematic diagram showing the configuration of the present invention. A case will be described in which the memory chip 8 is composed of one memory chip 8 and a chip 9 which is a device according to the present invention for storing and detecting the internal state of the memory. As already mentioned, K, 2 stores information! Inner loop, 5#'i Information between the outside and 11
The four loops between these loops are the control signals for the gates on the trans-edge to pass. A chip (P) that detects the internal state of the memory.
J+1 (referred to as "state aS indication chip" for simplicity) is basically one memory chip and l! 11 is manufactured in the same way.

As shown in the second rlljK, the status display chip 9 has two types of loops 10.11.
In the loop 1o having 7 and t, the bubble can be transferred to 120 snow positions via a transfer gate which is synchronized with a control signal sent to the memory chip. The positions of these 11V attached to the two loops can be determined by any relationship [8] if the information is known; This is commonly referred to as the "location information loop." Severe, loop 11 keme lock all addresses are detected and it is a research.
This condition is called a "memory address loop"! The 11m chip is constructed in the same module as the memory chip 8, and therefore the magnetic bubbles are transferred synchronously between both chips.

ζ1, this state is 1111! Regarding the operation of the display chip, first we will discuss the memory □ address loop. This loop is formed to have the same number of bits as the minor loop in the mesori chip.
-8, the bubble generator 18 injects one magnetic bubble into the memory address loop. The bubble detector 14 detects that the rotation of the magnetic field that has been completely applied is transferred by 41K, and that the magnetic bubble is transferred to a certain specific position. Defined as σII ground. J-J #This magnetic taba plume cage! When a signal is obtained from the detector 14 using 1 and 1, the memory address of - becomes the zero address. Let A be the signal from this detector 14.

Next, let's talk about the position information loop 11.The basic operation is the same as the memory address loop 2, and the number of bids is made equal to the major loop of the memory chip.Similar to the memory address loop, after manufacturing, In the inspection and adjustment process, a number of magnetic bubbles are injected into the position information loop 10 by the bubble generator 17. These are driven by a rotating magnetic field to move to 15 positions in the loop, and then the transformer 7 Agate-
Transfer the magnetic puzzle to 120th place. This is the state of the magnetic bubble memory device before use, so first let's examine the operation when reading information from the outside into the memory from this shape.

First, a rotating magnetic field is applied with the transfer gate closed, and the magnetic bubbles in the minor loop are transferred one after another, bringing a certain predetermined memory address under the transfer gate. As I mentioned earlier, in this memory address loop, r1 magnetic bubbles are transferred within the loop with KIWt, but they are fixed at the position of the magnetic bubble Fi12 in the position information loop and move in regular intervals. There's nothing wrong with that.

Next, the control signal 4 causes the transfer gate to open fI
-, transfer from Maiko loop to Major loop is done, and even in Mai position information loop i1 Ki Bano AF
Transfer within the major loop is performed in the zero-order mesori chip that is moved from the position i12 to the 15th position in the loop, and at this time the state vaI! The position information loop within the display chip is similarly transferred. Then, after reading the information λ, the transfer is performed again, and the magnetic bubble in the information loop is 150 Zeng, which is transferred from the major loop to the minor loop. There is. Next, the transfer gate is opened and information is transferred from the major loop to the minor loop, and at this time, the magnetic bubble is also transferred from 15 to 12 in the position information loop. With the above, the operation of reading λ is in the state of the end of the meeting information loop.
It's back. A similar operation is performed when inputting and outputting information. By setting the detection 111!5 in the position information loop, it becomes possible to obtain position information when information is being transferred within the major loop. In other words, a single magnetic puzzle is detected in the position information loop at the judgment position 11i1 (e.g., one position before the opening of the page), and a signal is sent to the outside. Detect information.

Now, the operations of the memory chip and the state-of-the-art chip have been described above in relation to each other. Next, we will discuss the case where the operation of the magnetic bubble memory at is stopped due to the power source.

In this case, it is necessary to observe the h state so that the needle amount is also in a general state, that is, the information is transferred to the major loop in the memory chip r, and is transferred to an arbitrary position within this loop. Even in such a situation, the internal state can be easily known by using the device of the present invention. The procedure will be explained below.

First, the transfer gate is kept closed and a rotating magnetic field is applied to crush the magnetic bubbles as they are transferred within the loop. In other words, by making one circuit through this loop, the position information in the major loop can be determined by obtaining a signal (hereinafter referred to as vkp) from the detector 13 in the position information loop. In other words, the first move at position 15, which connects to the transfer gate as shown in Figure 2! If a IIK detector is installed,
The magnetic bubble can be transferred to position 12 by transferring it once to the bale where detector KO2 was obtained, and then opening the transfer gate. In this case, in the memory chip, from the major runo to the original address of the minor loop,
Sowing information is transferred. Detected during operation of this - ``13''
If there is no signal at -, this means that information is not being transferred to the major loop, and the operation moves on to detect the next memory address.

Once the information from the major loop returns to the minor loop, it is once again sent through the minor loop by the rotating magnetic field.

And you got a signal on detector 14 in the minor loop?
Stop the IkK rotating magnetic field.

This and - state is the zero address.

The internal state can be detected in the same way even in a module composed of a large number of memory chips, as described above for the case of ten memory chips and a single memory chip.

At this time, the only information added is which chip among the multiple memory chips is transferring information to the major loop.

Next, two examples of system configurations will be shown when the present invention is applied to a module consisting of a large number of memory chips.

[Figure 3 is an example in which the above-mentioned memory address loop and position information loop are created in each memory chip.

n memory chips M1. M goose
...The shaded portion 18 in Mfl corresponds to 9 in the fa2 diagram. Transfer control signal 19 (T0.T, river...Tn) from the control circuit 20 of the transfer gate
is sent to each memory chip, and Maki2 is sent to each memory chip.
As shown in the figure, it is also connected to the location information loop. Also,
The signal 21 (P.

P,...Pn) are sent to the detection circuit 22. This circuit detects which memory chip is transferring information to the major lube and transfers the information to the major lube. ,......Controls Ts. From one of the many memory chips (Fiy% in the figure), a signal from the detector 14 in the memory address loop is sent to the circuit 24 through 25. This 240 circuit judges the memory address,
The coil 27 makes a strange judgment in the circuit 25 in conjunction with the data of the emotional detection circuit 22, and applies a rotating magnetic field of 11+.
A signal is sent to the control circuit 26 to instruct the stop of the rotating magnetic field.

The example in Fig. 4 is a memory chip M, , M,...
...In addition to M%, it has an F-shaped yap indicator chip in the same module, and is a system that centrally performs detection and e-control. Transfer signal 19 from transfer control circuit 20
(T1.Tx...T?L) is each memory chip and state L! 1 is sent to the confirmation chip 28. These signals are coupled to three position information loops formed within this chip. This situation ml! The signal 1329 (Pl) from the detector 13 in the position information loop is sent from the
*Pl...Ps) and the signal 30 from the detector 14 in the memory address loop (the excitation is sent to the detection circuit 31, where the control circuit 203 of the transfer signal and the coil applying the rotating magnetic field The command is sent to the control circuit 26 of 27.

In addition, in FIG. 3 and FIG. 4, the water source t and circuits related to signals to the bubble generators 16 and 17 are shown in FIG. 2 for setting the initial state, and the circuit for notifying the outside of the judgment situation. The township is omitted.

Above, nine application examples of the present invention have been shown. It is clear from these examples that the application of the invention is simple and can be realized with the addition of only a few peripheral circuits. The magnetic bubble memory according to the present invention is capable of restarting its operation even if it stops operating under any circumstances, and can fully exhibit its functions. Also,
Since the magnetic bubble memory if itself stores and detects its own internal state, it can be advantageous in terms of reliability and -F of compatibility.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the operation of a magnetic bubble with a major-minor loop configuration. FIG. 2 is a schematic diagram for explaining the magnetic bubble memory value of the present invention, and FIG. 1 is reproduced in the figure. 3rd v,
No.:y1・J,, □Yomei σ+A di! 1 and Demon X
Mr. Mogami, a lawyer who represents Tim, Fig. 1, Fig. 2

Claims (1)

[Claims] Magnetic bubble memory i! consists of modules with a predetermined number of memory chips. At t, each memory chip constituting the module or the Fi-specific memory chip reads the information in two types of special loops that can respectively detect position information and memory address information in the memory. This magnetic puzzle memory device is equipped with a detecting sound recorder that can be outputted, and is capable of obtaining position information and memory address information in each memory chip.