A pointer detection apparatus, comprising: (a) a conductor pattern including a plurality of first conductors disposed in a first direction and a plurality of second conductors disposed in a second direction which crosses the first direction; (b) a code string signal production circuit configured to produce a plurality of signals based on a plurality of code strings that are orthogonal to each other, each having the same code string and a phase different from each other; (c) a transmission conductor selection circuit configured to selectively supply the plurality of signals produced by the code string signal production circuit to the plurality of first conductors; (d) a reception conductor selection circuit configured to selectively receive signals from the plurality of second conductors generated in response to the plurality of signals supplied to the plurality of first conductors; (e) a signal detection circuit configured to detect a signal corresponding to a variation of capacitance between the conductor pattern and a pointer, based on the signals from the plurality of second conductors received via the reception conductor selection circuit; (f) an analog to digital conversion circuit configured to convert the signal output from the signal detection circuit into a digital signal comprising a word string formed of a plurality of bits; (g) a correlation detection circuit configured to determine correlation values between the plurality of code strings provided for correlation and the digital signal comprising a word string formed of a plurality of bits output from the analog to digital conversion circuit; (h) a memory circuit configured to store the correlation values successively output from the correlation detection circuit; and (i) a position calculation circuit configured to calculate a position on the conductor pattern pointed to by the pointer based on the correlation values, characterized in that the transmission conductor selection circuit being further configured to divide the plurality of first conductors into a plurality of blocks each including at least two first conductors, and to select one block among the plurality of blocks to supply the plurality of signals produced by the code string signal production circuit to those first conductors in the selected block, and the reception conductor selection circuit is further configured to: divide the plurality of second conductors into a plurality of blocks each including at least two second conductors, and combine signals received from the second conductors in each block for further processing, and in that the signal detection circuit is configured to process the signals collectively for each detection block, in that the detection of the position of the pointer is carried out by simultaneously using the signals from all second conductors of the detection block, wherein the reception conductor selection circuit is configured to switch from one detection block to another detection block to carry out the collective detection for each detection block. (a) a conductor pattern including a plurality of first conductors disposed in a first direction and a plurality of second conductors disposed in a second direction which crosses the first direction; (b) a code string signal production circuit configured to produce a plurality of signals based on a plurality of code strings that are orthogonal to each other, each having the same code string and a phase different from each other; (c) a transmission conductor selection circuit configured to selectively supply the plurality of signals produced by the code string signal production circuit to the plurality of first conductors; (d) a reception conductor selection circuit configured to selectively receive signals from the plurality of second conductors generated in response to the plurality of signals supplied to the plurality of first conductors; (e) a signal detection circuit configured to detect a signal corresponding to a variation of capacitance between the conductor pattern and a pointer, based on the signals from the plurality of second conductors received via the reception conductor selection circuit; (f) an analog to digital conversion circuit configured to convert the signal output from the signal detection circuit into a digital signal comprising a word string formed of a plurality of bits; (g) a correlation detection circuit configured to determine correlation values between the plurality of code strings provided for correlation and the digital signal comprising a word string formed of a plurality of bits output from the analog to digital conversion circuit; (h) a memory circuit configured to store the correlation values successively output from the correlation detection circuit; and (i) a position calculation circuit configured to calculate a position on the conductor pattern pointed to by the pointer based on the correlation values, divide the plurality of second conductors into a plurality of blocks each including at least two second conductors, and combine signals received from the second conductors in each block for further processing, and in that the signal detection circuit is configured to process the signals collectively for each detection block, in that the detection of the position of the pointer is carried out by simultaneously using the signals from all second conductors of the detection block, wherein the reception conductor selection circuit is configured to switch from one detection block to another detection block to carry out the collective detection for each detection block.