User`s manual

CHAPTER ONE
Introduction
The Digi SYNC/570 and the SYNCY57Oi are high-performance expansion
boards for ISA or Micro Channel computers. The SYNC/570 adds two syn-
chronous/asynchronous serial ports while the SYNW57Oi adds two or four
synchronous/ asynchronous ports. They are designed for applications
requiring cost-effective communications. Each board and connector
package is supplied with all the hardware and software needed for a
complete board installation.
The Hitachi HD64570 Serial Communications Adapter WA) provides a
highly-integrated advanced communications subsystem for the SYNC/570
and the SYNW57Oi. It further maximizes synchronous communications
performance by using protocol-specific features to minimize driver
overhead.
The onboard memory of both the SYNC/570 and the SYIW57Oi is directly
addressable by both the system and the SCA’s DMA. Program-initiated DMA
transfers operate at DMA/memory speed independently of other system
activity. This architecture provides low system overhead and high
performance.
The optional OEM software lock ensures that OEM software will operate
only with OEM-supplied boards.
SYNW57Oi (and SYNC/570 optionally) includes SurgeBlock”, which is
designed to protect the board and the computer in which it is installed
against damage from data line surges.
SYNC/S70
Multiple SYNC/570 boards may share a common memory window. Micro
Channel boards may also share a common interrupt request line.
The two ports of the SYNC/570 each have a high density DB-15 connector
to connect any device with an EIA-232-D interface to your computer. The
board operates at line speeds from 4800 baud to over 115K.
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