Serial Packet Mode; Serial Packet Format - Globalstar STINGR User Manual

STINGR pins
RTS
CTS
RxD
TxD

5.2 Serial Packet Mode

This mode is the legacy mode of operation as implemented in the STX2 and STX3 which consists of binary data packets.

5.2.1 Serial Packet Format

Preamble
Length
Command
Data
CRC
Revision 1.0
09/30/15
Revision 1.0
< 125 ms
Command
1. Lower RTS
2. Wait for CTS to go low
3. Send Command to STINGR
4. Raise RTS
5. STINGR raises CTS
6. STINGR sends response
Fixed pattern 0xAA
Total number of bytes in the serial packet including the preamble
Command type (See Table 5 Serial Packet Type). Responses to
commands carry the same command type as the command that
initiated the answer
Data associated with the command or answer
16 bit CRC
Figure 7 Serial Packet Format
Subject To Change without Notice
STINGR Users Manual
< 25 ms
Response
P a g e
Host pins
TxD
RxD
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