table 5. “jupiter” receiver serial port configuration truth table
nmea protocol select pin7
rom default select pin8
(pin 7) (pin 8)=00/01/10/11的情况如下
0 0 nmea message format; host port communication settings = 4800 bps, no
parity, 8 data bits, 1 stop bit. the receiver operates from default initialization
values stored in rom and will output the default nmea message set from
rom.
0 1 nmea message format; host port communication settings = 4800 bps, no
parity, 8 data bits, 1 stop bit. the receiver selects the default nmea output
message set and uses initialization values from the data stored in sram or
eeprom (*).
1 0 binary message format; host port communication settings = 9600 bps, no
parity, 8 data bits, 1 stop bit. the receiver operates from default initialization
values stored in rom.
1 1 data stored in sram or eeprom determines message format, host port
communication settings, and default message set (*).
(*) for further information, refer to the description of the rom default select pin (j1-8) below.