Pinout

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Pin Descriptions

Pin Number	BCM Pin	Pin Name	Description
2	5V	5V PWR	This pin is connected to the 5V power net.
3	GPIO 2	SDA	I2C Serial Data
4	5V	5V PWR	This pin is connected to the 5V power net.
5	GPIO 3	SCL	I2C Serial Data
8	UART RX	M95 TX	This pin functions as the serial data input to the module for UART communication.
10	UART TX	M95 RX	This pin functions as the serial data output from the module for UART communication
11	GPIO 17	DISABLE	By driving this pin to a HIGH level, the power of the whole HAT can be disabled
13	GPIO 27	GNSS RX	UART communication that connected to software serial port of Raspberry Pi
15	GPIO 22	GNSS TX	UART communication that connected to software serial port of Raspberry Pi
16	GPIO 23	STATUS	The STATUS pin is used to indicate the operation status of M95 module. It will output HIGH level when the module is powered on.
18	GPIO 24	PWRKEY	The module can be turned on by driving the pin BG96 PWRKEY to a HIGH-level voltage more than 500ms then pulling it down. You can apply the same process to power down to the module if it already powered up.
29	GPIO 5	3D FIX	The 3D_FIX is assigned as a fix flag output. The pin will output a high voltage level to indicate successful positioning.
31	GPIO 6	1PPS	Pulse per second output. Pulse per Second (PPS) can be used for time service.
33	GPIO 13	FORCE ON	Logic HIGH will force the module to be woken up from backup mode.
35	GPIO 19	GEO-FENCE	Can be used by GEO-FENCE application in need of.
37	GPIO 26	GNSS RESET	L96 module can be restarted by driving the RESET pin to a HIGH-level voltage for a certain time and then releasing it.
38	GPIO 20	USER LED	Active HIGH, to switch on the USER LED, the pin’s state should be HIGH.
40	GPIO 21	USER BUTTON	This pin is pulled-up by default. When the button is pressed, pin switches to LOW.
6,9,14,25,30,34,39	GND	GND	These pins are connected to ground.

Layout

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Dimension

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Electrical Characteristics of Pins

Pin Number	BCM Pin	Pin Name	Description	Min	Typ.	Max.	Unit
2	5V	5V PWR	Power Supply	4.8	5	5.25	V
3	GPIO 2	SDA	I2C Serial Data	3	3.3	3.6	V
4	5V	5V PWR	Power Supply	4.8	5	5.25	V
5	GPIO 3	SCL	I2C Serial Data	3	3.3	3.6	V
8	UART RX	M95 TX	UART	3	3.3	3.6	V
10	UART TX	M95 RX	UART	3	3.3	3.6	V
11	GPIO 17	DISABLE	Output	3	3.3	3.6	V
13	GPIO 27	GNSS RX	UART	3	3.3	3.6	V
15	GPIO 22	GNSS TX	UART	3	3.3	3.6	V
16	GPIO 23	STATUS	Input	3	3.3	3.6	V
18	GPIO 24	PWRKEY	Output	3	3.3	3.6	V
29	GPIO 5	3D FIX	Input	3	3.3	3.6	V
31	GPIO 6	1PPS	Input	3	3.3	3.6	V
33	GPIO 13	FORCE ON	Output	3	3.3	3.6	V
35	GPIO 19	GEO-FENCE	Input	3	3.3	3.6	V
37	GPIO 26	GNSS RESET	Output	3	3.3	3.6	V
38	GPIO 20	USER LED	Output	3	3.3	3.6	V
40	GPIO 21	USER BUTTON	Input	3	3.3	3.6	V

LEDs

POWER (PWR): This RED led shows the status of the power regulators of module is switched on or off. By default, the GPIO 17(DISABLE) pin is pulled up by hardware and the regulators juices the all board. To shut down the regulators, this pin needs to be driven to HIGH state.
STATUS (STAT): While the module is powered up by driving PWRKEY to HIGH state or pushing the PWRKEY button, this GREEN led turns on.
USER (USER): The BLUE user led can be controlled by driving the GPIO 27 pin.
NETLIGHT (NETL): This BLUE led indicates the status of the module. When the connection is established and data is being transmitted/received, this led will blink at special intervals.

Buttons

USER: This push button connected to GPIO21 and pulled up HIGH state by default. When you push the button, you will read LOW state from GPIO21.
PWRKEY: When M95 is in power off mode, it can be turned on to normal mode by pushing the PWRKEY button for at least 500ms.