Apparatus for controlling a signal processing system to operate

Details Apparatus for controlling a signal processing system to operate Apparatus for controlling a signal processing system to operate

1993-10-18

1996-01-09

Coleman, Eric

Boots, shoes, and leggings

395550, 3642315, 364270, 364DIG1, G06F 900

Patent

active

054836590

ABSTRACT:
In an apparatus for controlling a signal processing system to operate in high and low speed modes, a control unit determines a speed of system clock signals in accordance with the interpretation of a program when external clock signals are received. When a speed of the system clock signals is determined, the control unit controls the production of the system clock signals of a frequency dependent on the speed. As a result, a peripheral circuit of a low speed can be controlled to operate without the necessity of a complicated interface circuit, and a system of a high speed such as a system for the so-called television game can also be controlled to operate. Further, a limitation on an operation speed of a peripheral circuit is excluded so that an expansion of a signal processing system can be easy to be performed. Still further, all circuits of the signal processing system can be under operation states because a low speed mode is first realized when a power supply is turned on.

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