JPH03224366A - Still video camera control device - Google Patents

Abstract

PURPOSE:To reduce the cost of a board and to decrease number of connection members by incorporating plural control peripheral ICs interconnected with a data bus in common to a microcomputer into one-chip. CONSTITUTION:The controller consists of a microcomputer 1 and a single main control IC 2 of one chip. The main control IC 2 consists of an image sensor control block 3, a disk drive control block 4 and an input/output control block 5 and interconnected to each relevant control section with wires. Moreover, the microcomputer 1 and the main control IC 2 are mounted in a same board and they are interconnected with 4 CS, WR, AWR, RD and Data buses by using 8 wires at minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a still video camera constituted by a plurality of ICs (integrated circuits).

[Prior Art] FIG. 2 is an overall block diagram of a conventionally known still video camera. The overall operation of the still video camera will be explained using this figure. First, switch S in the diagram
When the system control unit 20 detects that W2 is turned on,
The shutter 22 is driven via the driver 21 according to the determined shutter speed, the charge accumulated in the image sensor 23 is read out under the control of the system control unit 20, and the video signal is sent to the signal processing circuit 24 and the recording circuit 25. The data is stored on the video floppy disk 27 by the head 26 via the video floppy disk 27.

Next, with reference to FIG. 3, the configuration of an IC forming the system control unit 20 that controls each of these parts will be explained. As shown in this figure, from the microcomputer 30,
Synchronous signal generator that controls the image sensor 23 SSG DD (disk drive) I/F (interface) that controls the drive circuit of the recording sheet motor, Ilo I/F that reads the status of each switch (SWI, 5W2) (input, output interface), C8 (chip select), WR (write strobe), RD (read strobe), AWR (address write strobe)
, Data (4-bit data bus), etc. are required.

In this case, the SSG is mounted on a signal processing board. In addition, the DD I/F is connected to the disk drive board.
The I/F is mounted on a switch operation board or the like.

Therefore, the number of wirings to various boards increases, and connection members such as connectors are also required.

[Problem to be solved by the invention]

In this way, in the above-mentioned conventional example, as the number of ICs increases, the number of wiring also increases, and especially when the wiring spans between other boards, the number of connecting members such as connectors also increases.
In addition to the cost increase due to the increase in the C unit price, the cost of the board, connector, etc. also increased significantly, which became a problem in product design.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a control device for a still video camera that reduces the cost of the board and the number of connecting members.

[Means for Solving the Problems j] A control device for a still video camera according to the present invention is characterized in that a plurality of control peripheral ICs connected to a microcomputer through a common data bus are housed in one chip. It is something to do.

[Function] According to the present invention, a plurality of ICs with completely different functions can be integrated into one
By using a chip, it is possible to reduce wiring between ICs and eliminate connecting members such as connectors between boards, thereby reducing costs.

〔Example〕

FIG. 1 is a block diagram of a system control unit that is an embodiment of the present invention. This embodiment consists of a microcomputer 1 and a single main control IC integrated into one chip.
Consists of 2. This main control IC2 includes an image sensor control block 3. Disk drive control block 4. It consists of an input/output control block 5, and wiring is provided to each corresponding control section (not shown).

In addition, microcomputer 1 and main control I
C2 and C2 are mounted on the same board, and are interconnected with the CS, WR, AWR, RD, and Data buses (4 lines) described in FIG. 3 by a minimum of 8 lines.

In the first embodiment described above, the SSG (synchronization signal generator) for image sensor control, the DD I/F for disk drive control, and the Ilo I/F for switch state detection were implemented on a single chip. For example, by configuring the shutter driver, LCD (liquid crystal display) driver, SSG of the reproduction circuit, etc. with one chip, the amount of wiring with the microcomputer can be drastically reduced.

[Effects of the Invention] As explained above, according to the present invention, by configuring ICs with various different functions on one chip, it is possible to reduce wiring from the microcomputer, and as a result, the cost of the board can be reduced. It becomes possible to remove the connection member between the boards.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of a system control unit to which the present invention is applied, Fig. 2 is a block diagram showing the entire conventional still video camera, and Fig. 3 is shown in Fig. 2. FIG. 2 is a detailed configuration diagram of a system control unit. DESCRIPTION OF SYMBOLS 1... Microcomputer, 2... Main control ICl, 3... Image sensor control block, 4... Disk drive control block, 5... Input/output interface block.

Claims (1)

[Claims] 1) A control device for a still video camera characterized in that a plurality of control peripheral ICs connected to a microcomputer via a common data bus are housed in one chip.