Data Sheet

NEO-7 - Data Sheet
UBX-13003830 - R04 Early Production Information Configuration management
Page 14 of 26
3 Configuration management
Configuration settings can be modified with UBX configuration messages. The modified settings remain effective
until power-down or reset. If these settings have been stored in battery-backup RAM, then the modified
configuration will be retained, as long as the backup battery supply is not interrupted.
With the NEO-7N, configuration settings modified with UBX configuration messages can be saved permanently.
In this case, the modified settings remain effective even after power-down and do not require backup battery
supply.
3.1 Interface Selection (D_SEL)
At startup the Pin 2 (D_SEL) determines which data interfaces are used for communication. If D_SEL is set high or
left open, UART and DDC become available. If D_SEL is set low, i.e. connected to ground, the NEO Module can
communicate to a host via SPI.
PIN #
D_SEL=”1”
(left open)
D_SEL =”0”
(connected to GND)
20 UART TX SPI MISO
21 UART RX SPI MOSI
19 DDC SCL SPI CLK
18 DDC SDA SPI CS_N
Table 6: Data interface selection by D_SEL