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RS-422/485 SERIAL INTERFACE PLUS, 4-PORT
To install the Card using factory-default settings, refer to Chapter 4,
Installation.
For your reference, record installed Card settings below:
Table 2-2. Your Installed Card Settings.
Port # Base Address IRQ Electrical Specifications
Port 1
Port 2
Port 3
Port 4
2.4 Technical Description
The IC058C Card uses the 16750 UART. This chip features programmable
baud rate, data format, and interrupt control, and a 16-byte input and output
FIFO. The IC183C card uses the 16950 UART, which features a 128-byte FIFO
for even better performance.
2.4.1 F
EATURES
• Automatic RS-485 driver enable/disable allows card to appear to be
RS-232, requiring no additional drivers
•
“
PAL” option allows for unique OEM address selection
• “Shareable” IRQs allow more than one port to share a single IRQ
• IRQs 2/9-7, 10, 11, 12, 15 supported
• 16750 buffered UARTs (IC058C) or 16950 UARTs (IC183C)
• 16 Bit address decode allows for easier integration
• Speeds up to 460.8 kbps available
• Multiple clocking modes ensure compatibility with existing software
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