DPV11 Serial Synchronous Interface User Guide

This document is the DPV11 Serial Synchronous Interface User Guide, published by Digital Equipment Corporation (DEC) in August 1980.

It serves as a comprehensive technical manual for users, providing information necessary for the configuration, installation, and operation of the DPV11 interface board.

The DPV11 is a serial synchronous line interface designed to connect a DEC LSI-11 bus to a serial synchronous modem. It supports various EIA electrical standards (RS-232-C, RS-423-A, RS-442-A) and is intended for synchronous data communication protocols such as BISYNC, DDCMP, and SDLC. Key features include full/half-duplex operation, double-buffered transmission/reception, software-selectable diagnostic loopback, and internal cyclic redundancy check (CRC) capabilities, operating at speeds up to 56K bits/second.

The manual is organized into chapters covering:

• Introduction: General description, features, specifications, and configurations of the DPV11.
• Installation: Instructions for unpacking, pre-installation requirements, physical installation, hardware verification, and details on test connectors.
• Register Descriptions and Programming Information: Detailed explanations of the DPV11's registers, bit assignments, data transfer processes, and interrupt vectors for low-level programming.

Additionally, the manual includes appendices with:

• A Diagnostic Supervisor Summary for troubleshooting and testing the interface.
• Detailed descriptions of integrated circuits (ICs) used in the DPV11, such as the Universal Synchronous Receiver/Transmitter (USYNRT) chip.
• Programming Examples for implementing both bit-oriented and byte count-oriented protocols.