IrDA communication engine which communicates among Viewcam still unit,
digital still camera and digital color printer has been developed. It
has realized, together with ASIC, the high-performance low-power-cons
umption microcomputer. Because of an embedded type microcomputer, ROM/
RAM's are limited from the viewpoint of transaction time, and the shor
tening of transaction time has been a key issue. The satisfactory subs
tantial communication rate has been achieved. This paper introduces a
function and the details of development of the IrDA communication engi
ne.