AlceOSD 0v3b

Pinouts

Analog

Pin	Description	dsPIC pin
1	Analog In 0	19 (AN0)
2	Analog In 1	20 (AN1)
3	GND

Video Input and Output

Pin	Description
1	Video Input
2	Video Voltage
3	GND

Pin	Description
1	Video Output
2	Video Voltage
3	GND

NOTE: Video voltage (pin 2 on both connectors) is not used by the OSD. Power board by 5V pin (USART1 or USART3)

USART1

Pin	Description	dsPIC pin
1	Reset	18 (/MCLR)
2	TX	8 (RP42)
3	RX	9 (RP43)
4	+5V
5	GND
6	GND
NOTE: Reset, TX and RX pins are 5V tolerant

USART2

Pin	Description	dsPIC pin
1	TX	41 (RP37)
2	RX	42 (RP38)
3	GND
NOTE: TX and RX pins are 5V tolerant

USART3

Pin	Description	dsPIC pin
1	GND
2	N.C.
3	N.C.
4	TX	43 (RP39)
5	RX	11 (RPI45)
6	5V
NOTES:

• Pinout is reversed from Pixhawk telemetry connectors (AlceOSD pin1 <-> Pixhawk pin6; AlceOSD pin2 <-> Pixhawk pin5; ...)
• RX pin is 5V tolerant but TX pin is not. However, connecting a 5V device to this port is not a problem. Just make sure you never connect an output pin from other 5V device to the TX pin of the OSD.

ICSP / USART4

Pin	Description	dsPIC pin
1	Reset	18 (/MCLR)
2	3.3V
3	GND
4	TX	24 (RP35)
5	RX	23 (RPI34)
NOTE: TX and RX pins are 3.3V only