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SAINT
Keyword 2000 to RS-
232 Gateway
01/20/04 Page 4 of 20
2 Overview
This document describes the operation of the Keyword 2000 to RS-232 Gateway. The gateway is often referred to
as the “SAINT gateway” or simply “SAINT”.
The following is synopsis of gateway features:
• Allows host system to communicate on Keyword 2000 bus.
• Performs timing, access, arbitration, serialization, and error control.
• Configuration via host to gateway messages.
• LED status indicator array:
1. Power LED (flashing LED)
2. Bus Message LED (toggles upon receiving a valid bus message)
3. Message Trigger LED (toggles upon receiving a specified byte pattern)
• Gateway to host status / error messages.
• Software is easily updated via a flash connector. Will eventually be done through the USB bus.
The following is a synopsis of requirements for use of the gateway:
Connection to power, ground, and busses to be monitored
RS-232 connection to host