Garmin Apollo CNX80, Installation Manual

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Appendix B - Serial Interface Specifications
B-6 560-0982-00 Rev D Apollo CNX80 Installation Manual
B.2 S
ERIAL
O
UTPUT
S
PECIFICATIONS
Available settings for the serial outputs are listed in Table B- 5. Not all settings are available on each
serial output port – refer to section 3.2.1.1 to determine which settings are available on a given port.
Table B- 5 - RS-232 Serial Output (TX) Selections
TX Comment Reference
N
ONE
No input connected. N/A
MAPMX Proprietary interface between CNX80 and MX20 v5.0 or later.
This interface will support auto chart selection, flightplans with
the new flight legs, zoom scale matching, altimeter correction,
and ILS and VOR navigation information. (MUST BE USED
WITH MAPMX SELECTED ON SAME INPUT PORT) N/A
CNX80 Proprietary interface to second CNX80 for cross-talking data
(MUST BE USED WITH CNX80 SELECTED ON SAME
INPUT PORT) N/A
M
APCOM
Moving map output data, nearest waypoint data, annunciator
data, flight plan waypoints and nav/com data. B.2.1
SL70 SL70/SL70R mode control and altitude data.
Refer to SL70 installation manual. 560-0402-xx
I
R
DA Not currently supported. N/A
B.2.1 Mapcom Output
When M
APCOM
is selected, the CNX will transmit moving map data, nearest waypoint data, flight plan
waypoints, and nav/com data on this output. The format of the MapCom output is as follows:
Baud rate: .............................................9600
Data bits: ..............................................8
Stop bits: ...............................................1
Parity: ...................................................none
Output rate: ...........................................approx. 1 sec. +/- 0.5 sec.
Message length: .....................................variable, approx. 164 to 958 bytes
B.2.1.1 Moving Map Data
Definitions of the Moving Map output data are included in Table B- 6 and Table B- 7. A sample output
message is included in .
The serial output messages are in the following format.
<STX><id><data><it><id><data><it>...<id><data><it><ETX>
<STX> .................................................ASCII “start of text” character (1 byte, 02h)
<id> ......................................................item designator (1 byte, from following table)
<data> ..................................................item data (format listed in following table)
<it> .......................................................item terminator (1 byte, 0Dh)
<ETX> .................................................ASCII “end of text” character (1 byte, 03h)