Data processing device and mobile device

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

2011-06-21

2011-06-21

Lee, Thomas (Department: 2116)

Electrical computers and digital processing systems: support

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

C713S400000, C713S401000, C713S500000, C713S501000, C713S502000, C713S503000, C713S601000

Reexamination Certificate

active

07966512

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.

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MMCA Technical Committee, “The MultiMediaCard,” System Specification Version 3.1, Jun. 2001, pp. 70-78.

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