PEB3086

The ISDN Subscriber Access Controller ISAC-SX PEB3086 integrates a D-channel HDLC controller and a four wire S/T interface used to link voice/data terminals to the ISDN. It is based on the ISAC-S PEB 2086, and provides enhanced features and functionality. It includes the S-transceiver (Layer 1), an HDLC controller PEB3086 for the D-channel and one B-channel protocol controller (HDLC or transparent) with reduced features dedicated for firmware download via the B-channel.

The system integration of PEB3086 is simplified by several configurations of the parallel microcontroller interface selected via pin strapping. They include multiplexed and demultiplexed interface selection as well as the optional indirect register PEB3086 access mechanism which reduces the number of necessary registers in the address space to 2 locations. The ISAC-SX also provides a serial control interface (SCI).

The FIFO PEB3086 size of the cyclic D-channel buffer is 64 bytes per direction with programmable block size (threshold). Besides TE mode the S-transceiver supports other terminal relevant operation modes PEB3086 like line termination subscriber side (LT-S), line termination trunk side (LT-T) and NT applications (NT, Intelligent NT mode).

An auxiliary I/O port of PEB3086 has been added with interrupt capabilities on two input lines. These programmable I/O lines of PEB3086 may be used to connect peripheral components to the ISAC-SX which need software control or have to forward status information to the host.

Three programmable LED outputs of PEB3086 can be used to indicate certain status information, one of them is capable to indicate the activation status of the S-interface automatically. The ISAC-SX PEB3086 is produced in advanced CMOS technology.