MC145488
overview of the MC145488 Dual Data Link Controller. The MC145488 is a two- channel ISDN LAPD controller with an on- chip direct memory access (DMA) controller. It is intended for ISDN terminal and switch applications where one or two channels of data will use HDLC- type protocols. The DDLC can also be used in local area, wide area network, and bridge router applications. Each serial interface can be clocked at data rates up to 10 Mbps. The DDLC can operate with microprocessors using clock frequencies up to 20.5 MHz. .. The DDLC is ideally suited for use with the MC145474 S/T- Transceiver. The interchip digital link (IDL) easily connects the chips together, providing a powerful layer one/layer two ISDN solution. A serial control port is provided to efficiently control the MC145474 or other ISDN family devices. The DDLC is patible with 68000 and 80186 bus structures. NOTE This document is a summary of principal features and operation of the DDLC. Please refer to the MC145488 DDLC data book...
