Table of Contents

1 Introduction
   1.1 Aims
   1.2 Interpretation
2 Principles of the Serial Highway System
   2.1 Configuration
   2.2 Messages
   2.3 Transmission of Bytes
   2.4 System Clock
   2.5 Serial Highway Ports
   2.6 Serial Driver
   2.7 Extended Uses of the Serial Highway
   2.8 Serial Crate Controller
3 Message Structure for Serial Crate Controllers
   3.1 Command Message
   3.2 Reply Message
   3.3 Demand Message
   3.4 Message Fields
   3.5 Formatting Bytes
4 Command/Reply Message Sequences
   4.1 General Requirements
   4.2 Read Operation
   4.3 Write Operation
   4.4 Control Operation
   4.5 Truncation of the Command Message
   4.6 Reply Space
5 Demand Message Generation
   5.1 Control of Demand Message Initiation
   5.2 Delay Buffer
   5.3 Identification of Demands
6 Identification of Message Type
   6.1 Complete Command Message (Minimum Length 8 Bytes, MI=00)
   6.2 Truncated Command Message (Length 2 Bytes; MI None)
   6.3 Reply Message (Length 3 or 7 Bytes; MI=01)
   6.4 Demand Message (Length 3 bytes; MI=1-)
7 Serial Highway D Ports
   7.1 D-Port Connectors
   7.2 Data and Clock Signals
   7.3 Control Signals
8 Timing
   8.1 Frequency of System Clock
   8.2 Byte Stream
   8.3 Signal Timing
   8.4 Propagation Delays
9 Bit-Serial and Byte-Serial Modes
   9.1 Byte-Serial Mode
   9.2 Bit-Serial Mode
10 Synchronization
   10.1 Message Synchronization
   10.2 Byte Synchronization
   10.3 Lost Synchronism: Actions by Serial Crate Controller
11 Access to Registers in Serial Crate Controller
   11.1 Status Register
   11.2 Other Registers
12 Features of Serial Crate Controller Accessed Via the Status Register
   12.1 Dataway Common Controls
   12.2 Command/Reply Transaction Status
   12.3 Demand Handling
   12.4 Reconfiguration Options
13 Serial Crate Controllers: Front Panel Features
   13.1 Manual Controls
   13.2 Indicators
   13.3 Connectors
   13.4 Other Front Panel Features
14 SGL-Encoder Connector
   14.1 Mechanical
   14.2 Signals at the SGL-Encoder Connector
   14.3 Signal Standards for the SGL-Encoder Connector
   14.4 Hung Demand Time Out
   14.5 SGL-Encoder Options
   14.6 Access for Auxiliary Controllers
15 Recovery from Errors
   15.1 Transmission-Path Failures
   15.2 Loss of Synchronism
   15.3 Transmission Errors
   15.4 The Error-Reply Message
   15.5 Error Indications in Reply Messages
   15.6 Error Recovery Using the Reread Command
16 Summary: Sequence of Actions in Serial Crate Controller
   16.1 Find Header
   16.2 Receive Command
   16.3 Execute Command
   16.4 Send Reply
   16.5 Find END
   16.6 Pass Message
   16.7 Send Demand
   16.8 Lost Byte Sync
   16.9 Lost Message Sync
Annex A (Informative)

Abstract

Describes a Serial Highway (SH) system using byte-organized messages, and configured as a unidirectional loop to which are connected a system controller and up to sixty-two CAMAC crate assemblies in accordance with ANSI/IEEE Std 583-1982, or other controlled devices.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN