DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4701A
INCREMENTAL ENCODER COUNTER
DESCRIPTION
The µPD4701A is a counter for an X, Y 2-axis incremental encoder. When a two-phase encoder signal is input for the X and Y axes, direction discrimination and computation is performed, and count data is output in 8-bit parallel form. In addition, a 3-contact-point input buffer is incorporated, which is useful for applications which use a pointing device such as a mouse or track-ball. The CPU checks the switch in.