JPH0895744A - Information processing LSI and information processing apparatus using the LSI - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the usability of the information processing LSI. An operation stop setting means 2001 for disabling the built-in display control means 1003 and a switching means 2008-2011 for switching the signal terminals 2004-2006 according to the state of the operation stop setting means are provided. As a result, it is possible to use the signal terminals switched without being aware of the switching state, and the usability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing LSI and an information processing apparatus including the information processing LSI, and in particular, an arithmetic processing means (CPU) and a display control means or an I / O control means are built in one LSI. And an information processing apparatus using the same.

[0002]

2. Description of the Related Art In a conventional LSI, when the number of terminals that can be installed is limited and it is not possible to secure all dedicated terminals for required signals, one terminal is designed to selectively switch and handle a plurality of signals. ing. Since such an LSI switches necessary signals according to priority, it is necessary to perform signal processing in consideration of the switching state, which is a problem in terms of usability.

Such an LSI is known as an information processing LSI for a portable personal computer in which miniaturization is important.

On the other hand, a convenient information processing LSI that can be applied to various information processing devices preferably has various built-in control means. However, as described above, the number of control means that can be installed is limited by the number of terminals that can be installed. There is no choice but to limit it.

[0005]

As described above, when the number of signals to be handled exceeds the upper limit of the number of terminals of the LSI, 1
It is necessary to selectively switch the signals handled by the two terminals,
Since signal processing in consideration of this switching state is required, there is a problem that the usability is poor.

An object of the present invention is to provide a highly versatile information processing LSI capable of selectively using built-in functional means and an information processing apparatus using the same.

Another object of the present invention is to simply use an information processing LSI or an information processing apparatus which is selectively switched between input and output of a plurality of signals at one signal terminal and is usable without being aware of the switching processing. To be able to do it.

[0008]

One of the features of the present invention is as follows.
Information processing L including arithmetic processing means and a plurality of display control means
In SI, an operation stop means for stopping at least one of the display control means and an operation stop setting means for setting information for controlling the operation stop means are provided.

Another feature of the present invention is an information processing apparatus comprising an information processing LSI having arithmetic processing means and a plurality of display control means, and a display means and a memory connected to the information processing LSI. An operation stop means for causing the processing LSI to stop at least one of the display control means;
The operation stop setting means for setting the information for controlling the operation stop means is provided.

Still another feature of the present invention is an information processing LSI having arithmetic processing means, display control means and a plurality of signal terminals.
In operation stop means for stopping at least one functional operation part of the display control means, operation stop setting means for setting information for controlling the operation stop means, and the stopped functional operation part of the display control means. There is provided switchable signal terminal switching means for allocating the assigned signal terminal as a signal terminal of another functional means according to the setting information of the operation stop setting means.

Still another feature of the present invention is an information processing LSI having arithmetic processing means, display control means, and a plurality of signal terminals.
And an information processing device including a display unit and a memory connected to the information processing LSI,
The operation stopping means for stopping at least one functional operation portion of the display control means, the operation stop setting means for setting information for controlling the operation stopping means, and the stopped functional operation portion of the display control means. There is provided switchable signal terminal switching means for allocating the assigned signal terminal as a signal terminal of another functional means according to the setting information of the operation stop setting means.

Still another feature of the present invention is an information processing LSI having arithmetic processing means, display control means, and a plurality of signal terminals.
And an information processing apparatus including a display unit and a memory controlled by the information processing LSI,
Includes an operation stop means for stopping the functional operation unit of the display control means, an operation stop setting means for setting information for controlling the operation stop means, and a signal terminal assigned to the stopped display control means. A switchable signal terminal switching unit that is assigned as a signal terminal of the arithmetic processing unit according to the setting information of the operation stop setting unit is provided, and the information processing apparatus further includes a signal terminal of the arithmetic processing unit of the information processing LSI. This is because an external display control means connected to the switched signal terminal and controlled by the arithmetic processing means is provided.

Still another feature of the present invention is, in an information processing LSI having arithmetic processing means, a plurality of display control means and a plurality of signal terminals, an operation stopping means for stopping at least one of the display control means, An operation stop setting means for setting information for controlling the operation stop means and a signal terminal assigned to the stopped display control means are used as signal terminals of other display control means according to the setting information of the operation stop setting means. There is provided switchable signal terminal switching means for allocating.

Still another feature of the present invention is information including an information processing LSI having an arithmetic processing means, a plurality of display control means, and a plurality of signal terminals, a display means connected to the commercial law processing LSI, and a memory. In the processing device, the information processing L
The operation stop means for stopping at least one of the display control means, the operation stop setting means for setting information for controlling the operation stop means, and the signal terminal assigned to the stopped display control means are included in the SI. There is provided a switchable signal terminal switching means that is assigned as a signal terminal of another display control means according to the setting information of the operation stop setting means.

Still another feature of the present invention is, in an information processing LSI having arithmetic processing means and a plurality of I / O control means, operation stopping means for stopping at least one of the I / O control means, and The operation stop setting means for setting the information for controlling the operation stop means is provided.

Still another feature of the present invention is an information processing device comprising an information processing LSI having arithmetic processing means and a plurality of I / O control means, and an I / O connected to the information processing LSI. The information processing LSI is provided with operation stopping means for stopping at least one of the I / O control means, and operation stop setting means for setting information for controlling the operation stopping means.

[0017]

The operation stopping means stops the operation of a part of the function operating means in accordance with the information set in the operation stop setting means, and the terminal switching means changes the signal terminals assigned to the function operating means in the operation stopped state. It is assigned to a signal terminal of another function operating means according to the setting information.

As a result, it becomes easy to selectively use the plurality of functional means incorporated in the information processing LSI, and the usability is improved. Further, since the signal terminal switching process can be simplified, the reliability is improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing a system configuration of an information processing apparatus such as a personal computer using the information processing LSI according to the present invention. 1001 is an information processing LSI according to the present invention, and 1002 is the information processing LSI 1001. A CPU (core), which is a main body that is incorporated and executes a program, a display control unit 1003 that displays the display information stored in the VRAM 1008 on the display unit 1007.
Reference numeral 4 is a memory control means for performing read / write control of the memory 1006, and 1005 is an I / O control means for controlling I / O-1 and I / O-2. 1006 is a memory such as SRAM or DRAM for storing programs and data, 1
Reference numeral 007 is a monochrome or color liquid crystal display means, display means such as CRT, and 1008 is an SRAM for storing display information.
VRAM, which is a memory such as a memory or a DRAM, 1009, 1
Reference numeral 010 is an input means such as a keyboard or a mouse, an output means such as a speaker, an LED or a printer, an associated storage means such as a floppy disk or a hard disk, or an I / O such as an input / output means such as a modem or FAX.
Reference numeral 011 is a system bus in which signal lines such as addresses, data, and command signals necessary for controlling the information processing LSI 1001 and the memory 1006 are collected.

FIG. 2 shows the information processing LSI according to the present invention.
FIG. 2 is a block diagram showing the internal configuration of 1001 in more detail, and reference numeral 2001 denotes a display control unit 1001 which is configured by a register, an input terminal, and the like (valid (operable) / invalid (stop operation)
The operation stop setting means for setting the display control means 1002, the clock signal generation means for generating the operation clock signal of the display control means 1003, and the input operation clock signal of the display control means 1001 according to the setting of the operation stop setting means 2001. The operation stopping means for disabling, 2004 is an output signal terminal such as a VRAM address signal output by the display control means 1003, 2005 is an input signal terminal such as a display mode setting, and 2006 is a bidirectional signal connected to a data bus of the VRAM 1008 or the like. Terminal, 2007 is the information processing LSI
CPU 1002 built in 1001 and display control means 1
It is an internal bus which is a set of signal lines for address, data, command signals and the like between the respective functional means such as 003.

Reference numerals 2008 to 2011 denote display control means 100.
3 signal line and other control means (CPU in this embodiment
The information processing LSI 10 by switching the signal line 1002)
01 is a switching means connected to the terminals 2004 to 2006.

FIG. 3 is a diagram showing the configuration of the operation stop setting means 2001. In this embodiment, the operation stop setting means 2001 is composed of a register such as a flip-flop, and the setting information for the control (setting) target means is set to “1” / “0” in the corresponding bits 3001 to 3003. Is shown. That is, if the bit mapped in the I / O space is set to "1" / "0" in the least significant bit 3001 of the I / O address 03F0H by the program processing by the CPU 1002, the built-in display control means 1003 is enabled. / Can be set to invalid. Further, if "1" / "0" is set in the bit 3002, the valid / invalid of the control means for controlling the I / O-1 (1009) can be set in the I / O control means 1005, and "1" is set in the bit 3003. By setting / "0", the I / O control unit 1005 can set valid / invalid of the control unit for controlling the I / O-2 (1009).

Next, the information processing LS configured as described above
The operation of the operation stopping means 2003 and the switching means 2008 to 2011 in I1001 will be described with reference to FIG. When the bit 3001 is set to valid (“1”) by the I / O instruction, “1” is input to the input B of the operation stopping unit 2003. As a result, the operation clock signal is input to the display control means 1003, and the display control means 1003 enters the operating state. In addition, switching means 2008-2011
Is switched to the "B" side.

As a result, input / output signals required by the display control means 1003 can be input / output using the terminals 2004 to 2006 of the information processing LSI 1001.

When the bit 3001 is set invalid ("0") by the I / O instruction, "0" is input to the input B of the operation stopping means 2003. As a result, the input of the operation clock signal to the display control means 1003 is prohibited, and the display control means 1003 stops its operation. Then, the switching means 2008 to 2011 are switched to the "A" side. As a result, the operation of the display control means 1003 is stopped and the input / output signal terminal 200 is put into an unused state.
4 to 2006 can be used by other functional blocks (CPU 1002 in this embodiment). For example, the display control unit 1003 is a monochrome type display unit 100.
The information processing LSI 1 configured to control 7
When 001 is used in the information processing apparatus equipped with the color type display means 1007, the color type display control means is externally attached, and the external display control means is connected to the input / output signal terminals 2004 to 2006. The color display control is performed by the control of the CPU 1002.

As described above, according to this embodiment, when the number of installable signal terminals (upper limit) of the information processing LSI 1001 is limited and the required number of signal terminals cannot be secured, the built-in display control means 1003 is installed. By setting to the invalid state, the signal terminals that are no longer needed can be switched and used for other purposes. Further, as an alternative to the built-in display control means 1003, an external display control means (LS) connected to the outside is used.
The signal terminals required for the interface between I) and the information processing LSI 1001 can be switched and used so as to use the signal terminals in the unused state.

Further, in this embodiment, the input signal terminals are switched to be used as the input signal terminals of other functional blocks, but the configuration may be used as the output signal terminals or bidirectional signal terminals of other functional blocks. It is possible and the direction between the signals to be switched is not particularly limited.

Although only the signal terminals used by the display control means 1003 are described in this embodiment, the actual information processing L
The SI 1001 is provided with a large number of signal terminals used by other functional blocks. In addition, the operation stop setting means 2001 in this embodiment uses the CPU 1 according to a program.
I used 002 as a register for setting information (external)
It is also possible to use an input terminal and switch the setting of the terminal to H / L (high level / low level). The configuration of the operation stop setting means 2001 is not particularly limited.

Next, another embodiment of the present invention will be described with reference to FIGS.
Will be explained. FIG. 4 shows an information processing LSI according to the present invention.
1 is a block diagram of 1001, 4002 and 4004 are operation stop means, 1005A and 1005B are I / O control means, 4005 to 4008 are switching means, 4009 is an output signal terminal, 4010 is an input signal terminal, and 4011 is a bidirectional signal terminal. 4012 are operation stop setting means.

In this embodiment, the signal terminals 4009 to 401 are used.
1 for CPU 1002 and I / O control means 1005A, 10
05B selectively uses the I / O 100 as described above.
9 and 1010 are controlled, and as shown in FIG. 3, bits 3002 and 30 of the operation stop setting means 4012 are set.
By setting “1” / “0” in 03, it becomes possible to selectively enable / disable the I / O control means (1) 1005A and (2) 1005B.

"0" is set in the bits 3002 and 3003,
When "0" is set, both I / O control means (1) 1005
A, (2) 1005B is stopped, and I is set at "0" and "1".
Only the / O control means (1) 1005A becomes effective,
When “1” or “0” is set, the I / O control means (2) 10
Only 05B is valid (“1” and “1” settings are prohibited). Then, according to the set value, the switching means 4005 to 4008 are set to the “A” side for “0” and “1”,
"1" and "0" are set to the "B" side, and "0" and "0" are set to the "C" side.

Next, the operation of this embodiment will be described with reference to FIG. When the bits 3002 and 3003 of the operation stop setting means 4012 are set to "0" and "1" (or "1" and "0") by the program, the I / O control means (1)
1005A (or I / O control means (2) 1005B)
Becomes valid (operating state), and the I / O control means (2) 10
05B (or I / O control means (1) 1005A) is disabled (operation is stopped). And switching means 4005
The input A (input B) is selected for I to O-4008.
1 (1009) (or I / O-2 (1010)) operation signals are input and output from the signal terminals 4009 to 4011 of the information processing LSI 1001.

For example, input / output signal terminals 4009 to 401
When the I / O 1009 connected to 1 is a printer,
When the printer is a serial interface type printer, the bit information of the operation stop setting means 4012 is set so that the I / O control means (1) 1005A is enabled and the I / O control means (2) 1005B is disabled. When the printer is a serial interface type printer, the bit information of the operation stop setting means 4012 is set so that the I / O control means (1) 1005A is disabled and the I / O control means (2) 1005B is enabled.

Similarly, it is also possible to provide two I / O control means corresponding to the difference between a hard disk storage device and a floppy disk storage device mounted as an external storage device so as to selectively function.

Similarly, a plurality of types of display control means such as a monochrome type and a color type or a liquid crystal type and a CRT type are built in the information processing LSI 1001 and used to selectively function. It is also possible to configure the information processing device.

Bit 300 of operation stop setting means 4012
When 2,3003 is set to "0" or "0", I / O control means (1) 1005A and I / O control means (2) 1005
Both B are disabled (stopped state), and the signal terminals 400 used by these I / O control means 1005A and 1005B.
9-4011 can be used in other functional blocks.

According to this embodiment, the information processing LSI 1001 incorporating a plurality of functional blocks having related functions.
In the system configuration in which the related function block is not selected at all, the signal terminal used by the related function block can be used in another function block.

Furthermore, in this embodiment, the signal terminal is released to another functional block only when the related functional block is not selected at all. However, even when the related functional block is selected, it is specified. A configuration is also possible in which the function terminals used only by the function blocks that are not selected (the operation setting is disabled) are released for use in other function blocks.

[0040]

As described above, according to the present invention, the operation of a part of the function operating means is stopped according to the information set in the operation stop setting means, and the signal assigned to the function operating means in the operation stopped state. Since the terminals are assigned to the signal terminals of other function operating means according to the setting information, the information processing LS
It becomes easy to selectively use the plurality of functional means incorporated in I, and the usability is improved. Further, since the signal terminal switching process can be simplified, the reliability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an information processing apparatus using an information processing LSI according to the present invention.

FIG. 2 is a block diagram detailing the internal configuration of an information processing LSI according to the present invention.

FIG. 3 is a configuration diagram of operation stop setting means in the information processing LSI according to the present invention.

FIG. 4 is a block diagram showing another embodiment of the information processing LSI according to the present invention.

[Explanation of symbols]

 1001 information processing LSI 1002 CPU 1003 display control means 1005 I / O control means 1007 display means 1008 VRAM 2001 operation stop setting means 2003 operation stop means 2008 switching means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masayuki Inoue Masayuki Inoue, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the Hitachi Media Visual Media Laboratory (72) Inventor Tsukasa Yamauchi 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Visual Media Research Laboratory (72) Inventor Masahito Fukushima 1-1-1, Higashi-Tagacho, Hitachi City, Ibaraki Prefecture Incorporated Hitachi, Ltd. Information Video Media Division (72) Inventor Kazuhisa Nishimoto Yokohama, Kanagawa Prefecture Hitachi Image Information System, 292 Yoshida-cho, Totsuka-ku (72) Inventor Yoshifumi Takahashi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Hitachi Image Information System, Inc.

Claims (13)

[Claims] 1. An information processing LSI comprising arithmetic processing means and a plurality of display control means, an operation stop means for stopping at least one of the display control means, and an operation for setting information for controlling the operation stop means. Information processing L characterized in that stop setting means is provided
SI. 2. An information processing apparatus comprising: an information processing LSI having an arithmetic processing means and a plurality of display control means; and a display means and a memory connected to the information processing LSI, wherein the information processing LSI is the display. An information processing apparatus comprising: an operation stop means for stopping at least one of the control means; and an operation stop setting means for setting information for controlling the operation stop means. 3. An information processing LSI comprising arithmetic processing means, display control means, and a plurality of signal terminals, an operation stop means for stopping at least one functional operation part of the display control means, and the operation stop means. Switching for allocating operation stop setting means for setting information to be controlled and signal terminals assigned to the stopped function operation section of the display control means as signal terminals of other function means according to the setting information of the operation stop setting means An information processing LSI provided with a possible signal terminal switching means. 4. An information processing apparatus comprising: an information processing LSI having an arithmetic processing means, a display control means, a plurality of signal terminals, and a display means and a memory connected to the information processing LSI. Assigned to an operation stop means for stopping at least one functional operation part of the display control means, an operation stop setting means for setting information for controlling the operation stop means, and a stopped functional operation part of the display control means An information processing apparatus comprising switchable signal terminal switching means for allocating the selected signal terminal as a signal terminal of another functional means according to setting information of the operation stop setting means. 5. An information processing apparatus comprising: an information processing LSI having an arithmetic processing means, a display control means, a plurality of signal terminals; and a display means and a memory controlled by the information processing LSI. An operation stop means for stopping the functional operation part of the display control means, an operation stop setting means for setting information for controlling the operation stop means, and a signal terminal assigned to the stopped display control means for stopping the operation. The information processing apparatus further includes a switchable signal terminal switching unit assigned as a signal terminal of the arithmetic processing unit according to setting information of the setting unit, and the information processing apparatus is further switched as a signal terminal of the arithmetic processing unit of the information processing LSI. An information processing apparatus comprising an external display control means connected to a signal terminal and controlled by the arithmetic processing means. 6. An information processing LSI comprising an arithmetic processing means, a plurality of display control means and a plurality of signal terminals, an operation stopping means for stopping at least one of the display control means, and the operation stopping means. Operation stop setting means for setting information, and switchable signal terminal switching for allocating signal terminals assigned to the stopped display control means as signal terminals of other display control means according to setting information of the operation stop setting means An information processing LSI provided with means. 7. An information processing LSI having arithmetic processing means, a plurality of display control means, and a plurality of signal terminals, and the information processing LS.
In an information processing device including a display unit and a memory connected to I, the information processing LSI sets an operation stopping unit that stops at least one of the display control units and information that controls the operation stopping unit. And a switchable signal terminal switching unit that assigns the signal terminal assigned to the stopped display control unit as a signal terminal of another display control unit according to the setting information of the operation stop setting unit. An information processing device characterized by the above. 8. An information processing LSI comprising arithmetic processing means and a plurality of I / O control means, operation stop means for stopping at least one of the I / O control means, and information for controlling the operation stop means. An information processing LSI characterized by comprising an operation stop setting means for setting. 9. An information processing apparatus comprising: an information processing LSI having arithmetic processing means and a plurality of I / O control means; and an I / O connected to the information processing LSI, wherein the information processing LSI is the I / O. An information processing apparatus comprising: an operation stop means for stopping at least one of the / O control means, and an operation stop setting means for setting information for controlling the operation stop means. 10. An information processing LSI comprising an arithmetic processing means, an I / O control means, and a plurality of signal terminals, and an operation stopping means for stopping at least one functional operation part of the I / O control means, The operation stop setting means for setting the information for controlling the operation stop means, and the signal terminal assigned to the stopped function operation part of the I / O control means are set to other function means according to the setting information of the operation stop setting means. An information processing LSI characterized by comprising switchable signal terminal switching means allocated as a signal terminal of the. 11. An information processing LSI having arithmetic processing means, I / O control means, and a plurality of signal terminals, and the information processing LS.
In an information processing device having an I / O connected to an I, the information processing LSI controls an operation stopping unit that stops at least one functional operation unit of the I / O control unit, and an operation stopping unit. And a signal terminal assigned to the stopped function operating unit of the I / O control unit is assigned as a signal terminal of another function unit according to the setting information of the operation stop setting unit. An information processing apparatus comprising a switchable signal terminal switching means. 12. An information processing LSI comprising an arithmetic processing means, a plurality of I / O control means and a plurality of signal terminals, an operation stopping means for stopping at least one of the I / O control means, and an operation stopping operation. Operation stop setting means for setting information for controlling the means, and a signal terminal assigned to the stopped I / O control means, and a signal terminal of another I / O control means according to the setting information of the operation stop setting means. An information processing LSI characterized in that it is provided with a switchable signal terminal switching means assigned as. 13. An information processing device comprising an information processing LSI having arithmetic processing means, a plurality of I / O control means, and a plurality of signal terminals, and an I / O connected to the information processing LSI. The LSI is assigned to the operation stop means for stopping at least one of the I / O control means, the operation stop setting means for setting information for controlling the operation stop means, and the stopped I / O control means. An information processing apparatus comprising switchable signal terminal switching means for allocating a signal terminal as a signal terminal of another I / O control means according to setting information of the operation stop setting means.