SkyTraq NS-HP-GN2 - PIN OUT DESCRIPTION; J1 Pin Description

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4. PIN OUT DESCRIPTION
Pin No.
Name
Description
J1
1
BOOT_SEL
No connection for normal use. Pull-low for loading firmware into empty or
corrupted Flash memory from ROM mode for the master processor.
2
NC
No connection, empty pin
3
1PPS
One-pulse-per-second (1PPS) time mark output, 3.3V LVTTL. The rising edge
synchronized to UTC second when getting 3D position fix. The pulse duration is
about 100msec at rate of 1 Hz.
4
TRIG
External trigger input for generating STI,005 time stamp, 3.3V LV-TTL
5
NC
No connection, empty pin
6
RX2
UART serial data input, 3.3V LVTTL.
One simplex asynchronous serial UART port is implemented. This UART input is
used for receiving RTCM-SC104 data or SkyTraq raw measurement data from
the base at 115200.
7
NC
No connection, empty pin
8
RSTN
External active-low reset input to the receiver.
Only needed when power supply rise time is very slow or software controlled
reset is desired.
9
NC
No connection, empty pin
10
GND
Ground
11
NC
No connection, empty pin