Kawasaki 80C51, KS152JB, 80C152 technical specifications Global Serial Channel, Introduction

KS152JB Universal Communications Controller Technical Specifications

3.0GLOBAL SERIAL CHANNEL

3.1Introduction

The Global Serial Channel (GSC) is a multi-protocol, high performance serial interface targeted for data rates up to 2 MBPS with on-chip clock recovery, and 2.4 MBPS using the external clock options. in applications using the serial channel, the GSC implements the Data Link Layer and Physical Link Layer as described in the ISO reference model for open systems interconnection.

The GSC is designed to meet the requirements of a wide range of serial communications applica- tions and is optimized to implement Carrier-Sense Multi-Access with Collision Detection (CSMA/CD) and Synchronous Data Link Control (SDLC) protocols. The GSC architecture is also designed to provide flexibility in defining non-standard protocols. This provides the ability to retrofit new products into older serial technologies, as well as the development of proprietary interconnect schemes for serial backplane environments.

The versatility of the GSC is demonstrated by the wide range of choices available to the user. The various modes of operation are summarized in Table 3.1. In subsequent sections, each available choice of operation will be explained in detail.

In using Table 3.1, the parameters listed vertically (on the left hand side) represent an option that is selected (X). The parameters listed horizontally (along the top of the table) are all the parame- ters that could theoretically be selected (Y). The Symbol at the junction of both X and Y deter- mines the applicability of the option Y.

Note, that not all combinations are backwards compatible. for example, Manchester encoding requires half duplex, but half duplex does not require Manchester encoding.

Kawasaki LSI USA, Inc. Page 32 of 120 Ver. 0.9 KS152JB2