u-blox SAM-M8Q - Design; Pin description

SAM-M8Q - Hardware Integration Manual
UBX-16018358 - R05 Production Information Design
Page 9 of 23
2 Design
2.1 Pin description
Function
PIN
No
I/O
Description
Remarks
Power
VCC
17
Main supply
Provide clean and stable supply (low impedance, < 0.2 Ohms).
GND
1, 4, 5, 6,
10, 11, 15,
16, 20
Ground
Assure a good GND connection to all GND pins of the module.
VCC_IO
2
VCC_IO
IO supply voltage. Must be always supplied. Usually connect to
VCC Pin 17
V_BCKP
3
Backup Supply
It is recommended to connect a backup supply voltage to V_BCKP
in order to enable Warm- and Hot Start features on the positioning
module. Otherwise, connect to VCC_IO.
UART
TXD
13
O
Serial Port
Can be configured as TX_Ready for DDC interface. Leave open if
not used.
RXD
14
I
Serial Port
Leave open if not used.
DDC
SCL
12
I
Serial Port
Leave open if not used.
SDA
9
I/O
Serial Port
Leave open if not used.
System
RESET_N
18
I
Reset (Active
Low)
Leave open if not used. Do not drive high. Do not connect a
capacitor at this pin.
TIMEPULSE
7
O
1PPS
Configurable Timepulse signal (one pulse per second by default).
Leave open if not used.
EXTINT
19
I
Ext. Interrupt
Leave open if not used.
SAFEBOOT_N
8
I
Leave open.
Table 1: SAM-M8Q Pinout
2.2 Minimal design
This is a minimal setup for a SAM-M8Q GNSS antenna module:
Figure 3: SAM-M8Q GNSS patch antenna design