Clock-synchronized serial communication device and...

Details Clock-synchronized serial communication device and... Clock-synchronized serial communication device and...

2005-09-20

2005-09-20

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S145000, C327S198000, C375S355000

Reexamination Certificate

active

06946886

ABSTRACT:
In a clock-synchronized serial communication device, a counter counts pulses in a communication clock signal. When the count reaches 8, the counter sets a start signal. With this start signal, a pulse generator outputs the first to fourth signals successively. Received data stored in a receiving shift register is transferred to a received-data processing circuit synchronously with the first signal. The received data is further transferred to a timer-setting value register as a timer-setting value synchronously with the second signal. A timer present value is output from a timer present value register synchronously with the third signal. The timer present value is further written into a transmitting shift register as transmission data synchronously with the fourth signal.

REFERENCES:
patent: 5787132 (1998-07-01), Kishigami et al.
patent: 5928293 (1999-07-01), Jobling et al.
patent: 6134285 (2000-10-01), Lo
patent: A-09-237131 (1997-09-01), None

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