Electronic apparatus with communication function having power so

Details Electronic apparatus with communication function having power so Electronic apparatus with communication function having power so

1990-11-26

1993-12-28

Harrell, Robert B.

Boots, shoes, and leggings

3642601, 364270, 3642711, 364DIG1, 395800, 395750, G06F 104, G06F 126

Patent

active

052747980

ABSTRACT:
In a normal state, a time counting process and a key input process are performed in accordance with an oscillation signal of 38.4 KHz generated by a crystal oscillator. In a data communication mode, a process for exchanging data with an external appliance is performed in accordance with a frequency-divided signal of the above oscillation signal and received data are stored in a memory simultaneously in a high speed process under control of an oscillation signal of 800 KHz generated by a CR oscillator. A power source circuit provides a high power source voltage, preventing all circuits from a defective operation while the high speed process is performed since the high speed process can decrease a power source voltage.

REFERENCES:
patent: 4361409 (1982-11-01), Sutter
patent: 4397563 (1983-08-01), Ichinose
patent: 5017766 (1991-05-01), Tamada et al.
patent: 5086438 (1992-02-01), Sugata et al.
patent: 5133064 (1992-07-01), Hotta et al.
patent: 5148376 (1992-09-01), Sato

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