SkyTraq PX1175RDP - Page 7

7
46,47
NC
No connection, empty pin
48
GND
Ground
49
RSTN
External active-low reset input to the baseband.
Only needed when power supply rise time is very slow or software controlled
reset is desired.
50
BOOT_SEL
No connection for normal use. Pull-low for loading firmware into empty or
corrupted Flash memory from ROM mode.
51,52
NC
No connection, empty pin
53
1PPS
One-pulse-per-second (1PPS) time mark output, 3.3V LV-TTL. The rising edge
synchronized to UTC second when getting 3D position fix. The pulse duration is
about 100msec at rate of 1 Hz.
54
NC
No connection, empty pin
The unshown inner grids on the bottom side of the module are GND pads.
The RTCM correction data can be input from either pin-43 RXD_B or pin-26 RXD2_B, but not both. NMEA result is
output over TXD_B.