Technical description – Impulse 2101 User Manual
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Technical Description
Sealevel Systems SeaLINK+232 Page
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Technical Description
The SeaLINK+232 utilizes a USB UART. This chip features programmable baud rate, data format, 128 byte Dual
Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS-232 transceiver supports data rates up to 460.8K baud.
Refer to Appendix C for cable length limitations.
Features
• Hot-Pluggable device that doesn’t require opening the case
• No system resources are required (i.e. I/O ports or IRQs)
• LED status indicators for “USB Enabled”, “TD”, and “RD”
Connector Pin Assignments (DB25 Male)
Name Pin
#
Mode
TD
Transmit Data
2
Output
RTS
Request To Send
4
Output
DTR
Data Term Ready
20
Output
GND Ground
7
RD
Receive Data
3
Input
DCD
Data Carrier Detect
8
Input
DSR
Data Set Ready
6
Input
CTS
Clear To Send
5
Input
RI
Ring Indicator
22
Input
Note: These assignments meet EIA/TIA/ANSI-232 DTE specifications for DB-25 type connectors.