Analog/digital converter for detecting coincidence or non-coincidence between data and a micro-computer including the analog/digital converter

DETAILED DESCRIPTION An object of the present invention is to solve the above-mentioned problems and defects by providing an analog/digital converter that may easily perform a coincidence detection operation at a critical moment when coincidence occurs between A/D converted data and a reference value, and providing a micro-computer having the analog/digital converter installed therein.
Therefore, according to an embodiment of the present invention there is provided an analog/digital converter, including a CPU for executing operations; an analog/digital converting unit configured to convert into digital data analog data acquired by measuring an object; a converted data storing unit configured to store data converted in the analog/digital converting unit; a reference value storing unit configured to store a reference value serving as a base of operation of the CPU; a comparing data storing unit configured to store comparing data that indicate which bits of the converted data stored in the converted data storing unit are to be compared with which bits of the reference value stored in the reference value storing unit; a comparing unit configured to select comparison bits among the converted data and the reference value and to perform a comparison between the converted data and the reference value; and an interrupt request signal generating unit configured to generate an interrupt request signal to the CPU when the comparing unit detects coincidence.
The analog/digital converter consistent with the present invention may adjust a coincidence detection range by selecting comparing bits for a comparison between converted data and a reference value so as to compensate differences of timings at a moment when analog data reaches to a reference value and a time when the analog data is converted to digital data.
Consequently, the present invention may provide an analog/digital converter that may easily perform coincidence detection operation between converted data and a reference value.
Thus, the present invention may provide an analog/digital converter having a high reliability of coincidence detection by a relatively easy operation and a micro-computer in which the A/D converter of such a high reliability is installed