Video camera and method with controlled interface registers

Details Video camera and method with controlled interface registers Video camera and method with controlled interface registers

1994-06-16

1996-10-22

Peng, John K.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348231, H04N 5228, H04N 576

Patent

active

055681913

ABSTRACT:
A video camera is provided in which an effective image plane is not affected even if a command to write data is supplied from a microcomputer to a signal processing portion in an effective video period. A plurality of control registers are provided in an interface portion. If a command to write data is supplied from the microcomputer to the signal processing portion in an effective video period for a video signal, data, which must be transferred, and address are temporarily stored in the registers and the stored signals are transferred to the signal processing portion in a retrace line period for a next video signal. As a result of the structure, data is written on the signal processing portion in the retrace line period for the next video signal even if the command to write data is supplied from the microcomputer to the signal processing portion. Therefore, if data different from the data which must be transferred is supplied from the microcomputer to the register on which the data for the signal processing portion has been written, the effective image plane is not affected.

REFERENCES:
patent: 5093716 (1992-03-01), Kondo et al.
patent: 5101277 (1992-03-01), Kanata
patent: 5200813 (1993-04-01), Jeon
patent: 5287171 (1994-02-01), Ohtsubo
N. Naji, "Serial techniques expand your options for .mu.C peripherals," Electrical Design News 33 (1988) Feb. 18, No. 4, pp. 199-204.

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