Impulse 7202 User Manual
Page 9
Technical
Description
Sealevel Systems COMM+232.PCI Page
6
The ISP is at Base+7 on each port (Example: Base = 280 Hex, Status Port = 287,
28F… etc.). The COMM+232.PCI will allow any one of the available locations
to be read to obtain the value in the status register. Both status ports on the
COMM+232.PCI are identical, so any one can be read.
Example: This indicates that Channel 2 has an interrupt pending.
Bit
Position: 7 6 5 4 3 2 1 0
Value
Read: X X X X X X 1
0
Note: Bit positions D7-D2 are not biased in anyway and may report back as
either a 1 or a 0. When checking the ISP, these bits should be masked.
Connector Pin Assignments
RS-232 (DB-9 Male)
Name Pin
#
Mode
TD
Transmit Data
3
Output
RTS
Request To Send
7
Output
DTR
Data Term Ready
4
Output
GND Ground
5
RD
Receive Data
2
Input
DCD
Data Carrier Detect
1
Input
DSR
Data Set Ready
6
Input
CTS
Clear To Send
8
Input
RI
Ring Indicator
9
Input
Note: These assignments meet EIA/TIA/ANSI-574 DTE for DB-9 type
connectors.