Patent Number: 6,295,135

Title: Release of busy signal when free capacity of a reception buffer exceeds a predetermined amount

Abstract: A data receiving apparatus which performs a handshake reception to set a busy signal upon reception of data and reset the busy signal upon storage of the received data in a buffer. The apparatus includes a busy extension unit and a reset control unit. The busy extension unit is for extending the set busy signal by a predetermined time period and resetting the busy signal after expiration of the predetermined time period, when a free capacity of the buffer becomes smaller than a first value in process of performing the handshake reception. The reset control unit enables the busy extension unit to reset the busy signal after expiration of the predetermined time period, if the free capacity of the buffer does not reach a second value during the predetermined time period, and for disabling the busy extension unit and resetting the busy signal prior to expiration of the predetermined time period, if the free capacity of the buffer does reach the second value during the predetermined time period.

Inventors: Horigome; Hideo (Yokohama, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G06K 15/00 (20060101); G06K 015/00 ()

Expiration Date: 09/25/2018