Data processing device and mobile device

Details Data processing device and mobile device Data processing device and mobile device

2004-04-20

2009-02-10

Patel, Nitin C (Department: 2116)

Electrical computers and digital processing systems: support

Clock control of data processing system, component, or data...

C713S400000, C713S401000, C713S500000, C365S223000, C365S226000, C365S194000

Reexamination Certificate

active

07490258

ABSTRACT:
A microcomputer is provided having a memory card interface capable of correctly latching data even when a card such as an MMC card is connected thereto. In the microcomputer having an interface with an external device such as a memory card, the interface unit is provided with an output driver connected to an external terminal for outputting a clock signal to output the clock signal and with an equivalent load circuit capable of imparting, to the clock signal extracted from an arbitrary position in a stage previous to the output driver in a clock signal path, delay equivalent to delay resulting from an external load connected to the external terminal in order to generate a clock signal for latching data inputted from the memory card.

REFERENCES:
patent: 6650589 (2003-11-01), Clark
patent: 6917561 (2005-07-01), Moss et al.
patent: 2004/0064749 (2004-04-01), Grossnickle et al.
patent: 2004/0156616 (2004-08-01), Strub et al.
patent: 2004/0213051 (2004-10-01), Lin et al.
patent: 2005/0114725 (2005-05-01), Patel et al.
patent: 2005/0243635 (2005-11-01), Schaefer
MMCA Technical Committee, “The MultiMediaCard,” System Specification Version 3.1, Jun. 2001, pp. 70-78.

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