Rainbow Electronics ATR0622 - Manual (Page 10)

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4891CS–GPS–01/06
ATR0622 [Preliminary]
3.3.2 Sensitivity Settings
3.3.3 Serial I/O Configuration
The ATR0622 features a two-stage I/O message and protocol selection procedure for the two
available serial ports. At the first stage, a certain protocol can be enabled or disabled for a
given USART port or the USB port. Selectable protocols are RTCM, NMEA and UBX. At the
second stage, messages can be enabled or disabled for each enabled protocol on each port.
In all configurations discussed below, all protocols are enabled on all ports. But output mes-
sages are enabled in a way that ports appear to communicate at only one protocol. However,
each port will accept any input message in any of the three implemented protocols
Both USART ports and the USB port accept input messages in all three supported protocols
(NMEA, RTCM and UBX) at the configured baud rate. Input messages of all three protocols
can be arbitrarily mixed. Response to a query input message will always use the same proto-
col as the query input message. The USB port does only accept NMEA and UBX as input
protocol by default. RTCM can be enabled via protocol messages on demand.
In Auto Mode, no output message is sent out by default, but all input messages are accepted
at any supported baud rate. Again, USB is restricted to only NMEA and UBX protocols.
Response to query input commands will be given the same protocol and baud rate as it was
used for the query command. Using the respective configuration commands, periodic output
messages can be enabled.
Table 3-5. GPS Sensitivity Settings
GPSMODE3
(Fixed PU)
GPSMODE2
(Reset = PU) Description
0 0 Auto mode
0 1 Fast mode
1 0 Normal mode (Default ROM value)
1 1 High sensitivity
Table 3-6. Serial I/O Configuration
GPSMODE12
(Reset = PU)
GPSMODE6
(Reset = PU)
GPSMODE5
(Reset = PD)
USART1/USB
(Output Protocol/
Baud Rate (kBaud))
USART2
(Output Protocol/
Baud Rate (kBaud)) Messages Information Messages
0 0 0 UBX/57.6 NMEA/19.2 High User, Notice, Warning, Error
0 0 1 UBX/38.4 NMEA/9.6 Medium User, Notice, Warning, Error
0 1 0 UBX/19.2 NMEA/4.8 Low User, Notice, Warning, Error
0 1 1 –/Auto –/Auto Off None
1 0 0 NMEA/19.2 UBX/57.6 High User, Notice, Warning, Error
1 0 1 NMEA/4.8 UBX/19.2 Low User, Notice, Warning, Error
1 1 0 NMEA/9.6 UBX/38.4 Medium User, Notice, Warning, Error
1 1 1 UBX/115.2 NMEA/19.2 Debug All