User manual

Page 5 MSI-P602 User Manual
NMEA output at a default BAUD rate of 4800. Software
selectable NMEA protocols using the secondary serial port are
GGA (default), GLL, GSA, GSV, RMC, VTG (default) and ZDA.
Baud rates are selectable from 2400 to 38,400. The DGPS
protocol is RTCM SC-104.
The serial ports are standard IBM PC compatible UARTs. The
primary port is jumper selectable for COM1 or COM3 with an
optional 16-bit offset address. Similarly, the secondary port is
selectable at COM2 or COM4 with an optional 16-bit offset
address.
A time mark of 1 PPS is available as an interrupt or as input into
modem status line DCD of the secondary UART for synchronizing
events. The primary and secondary UART interrupt are also
provided for allowing interrupt processing of GPS data. Interrupts
are jumper selectable for IRQ3 thru IRQ7 and IRQ9, as
described in the next section.
Four TTL level digital inputs are provided by status lines CTS
and DSR of the primary and secondary UARTs. Four TTL level
outputs are provided by OUT1 and OUT2 of these UARTs.
The card is supplied with an active antenna having a 5 meter
(16.5 ft.) cable and a spacer kit. A sample test program is
supplied that illustrates programming of the UARTs for the
various protocols and data transfer rates. Operates from -40°
to 85° C.