A-1
Appendix A
Serial Interface Specification
Purpose
The Serial Interface Specification (SIF) describes the requirements that two digital systems
must meet to exchange asynchronous serial data. SIF deals only with the physical flow control
and asynchronous serial transmission of data between two digital systems. This specification
does not impose any requirements on how the data is packaged and the number of characters
exchanged.
SIF data exchange generates errors under certain conditions. However, SIF does not specify
the specific actions to take to correct the error. Instead, this is left to the software/hardware
layer above SIF.
Terms and Definitions
The Systems
Unless otherwise noted, the systems described in this specification are digital systems.
Inactive
The interpretation of what physical quantity represents inactive is up to each system. Two
systems must have the same interpretation of inactive in order to communicate.
The Decoder and the Host
The two systems described in this specification are named the decoder and the host. Only one
host is allowed to exist at any time.
Summary of Contents for SE 923
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Page 29: ...2 7 Installation Figure 2 3 Exit Window Positioning CASE 1 CASE 2...
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