Portable computer capable of switching CPU clocks

Details Portable computer capable of switching CPU clocks Portable computer capable of switching CPU clocks

1992-10-07

1995-12-26

Heckler, Thomas

Boots, shoes, and leggings

364DIG1, 3642311, 3642702, G06F 108

Patent

active

054796458

ABSTRACT:
A CPU includes a register for setting a clock frequency and a frequency divider. The CPU sets an internal clock by frequency-dividing an externally supplied fundamental clock. A set of data set in the frequency setting register is selected through a setup menu displayed on a display unit. Of the data constituting the selected set, a default value is set in the register. When a predetermined key operation designating a frequency switching operation is detected by a detection circuit, the CPU updates the data set in the frequency setting register in accordance with the key operation, thereby changing the operating speed.

REFERENCES:
patent: 5086387 (1992-02-01), Arroyo et al.
patent: 5167031 (1992-11-01), Watanabe
386.TM. SL Microprocessor SuperSet Programmer's Reference Manual Intel discloses clock control on pp. 5-13 to 5-17.
386.TM. TM SL Microprocessor System Design Guide Intel discloses clock control in chapter 14.3.2, pp. 14-15 to 14-18.

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