Interface circuit for connecting a digital equipment to a time multiplex link

摘要

PCT No. PCT/FR85/00296 Sec. 371 Date Jul. 15, 1986 Sec. 102(e) Date Jul. 15, 1986 PCT Filed Oct. 16, 1985 PCT Pub. No. WO86/02513 PCT Pub. Date Apr. 24, 1986.The invention relates to an interface circuit for connecting a digital equipment (2) for sending and receiving data to a time multiplex link (3). The connection interface circuit is provided with a bit send terminal (3E1) and a bit receive terminal (3R1) for connection to the corresponding wires (3E, 3R) of a time multiplex link (3) in parallel with other interface circuits (1 or 8) of equipments for transmitting and receiving digital data (2) or speech signals (4). The interface circuit includes a synchronization arrangement (12) enabling it to be connected to the multiplex link (3) in a manner identical to that provided for the interface circuit (8) of the transmitter/receiver equipments for speech signals (4) and to adapt itself automatically to the bit rate capabilities offered by the multiplex link. The interface circuit further includes transmit and receive register groups as well as a buffer register group disposed between the transmit and receive registers and a microprocessor of the digital equipment. Also included is a control arrangement for simultaneously driving the transmit and receive registers in connection with the synchronization arrangement, and for driving the buffer registers under the control of the microprocessor of the digital equipment.