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BENDIX/KING KLN 90B
Rev 5, April/2003 10521I05.TDC Page A-3
1.0 RS-232
The RS-232 interface will have the following characteristics:
Electrical per EIA RS232C
9600 baudrate, 8 bits, 1 start bit, 1 stop bit, no parity
MARK is a logical 1 (one) and SPACE is a logical 0 (zero)
START bit begins as MARK, goes to SPACE
The order of transmission within each data byte shall be :
START bit
Data bit 0 (lsb)
Data bit 1
Data bit 2
Data bit 3
Data bit 4
Data bit 5
Data bit 6
Data bit 7 (msb)
STOP bit
1.1 HOOK-UP CONFIGURATIONS
The RS-232 input and output can be hooked up in different configurations.
For normal operations, the RS-232 input will be connected to a fuel sensor and/or air data. In
installations where the RS-232 input is not connected to a fuel sensor and air data, it will be looped
back to RS-232 output. However, in test mode, the RS-232 input and output can be connected to
a PC to read or write from or to a memory location or port.
The RS-232 output provides navigation and self-test data in normal and test modes. In test
mode, if a memory or port read or write request is received, the system will send the corresponding
response packet(s) and stops sending navigation and self-test data. The only way to resume nav-
igation and self-test data output is by recycling the power.
1.1.1 NORMAL AND TEST MODES:
RS-232 navigation data
self-test data
ELT and/or
moving map
and/or PC
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