
Pin:		Function:

GND 		System ground. Connect to power supply ground (GND)terminal.

5V 		System power, 5 VDC input.

SOUT 		Serial output to host. 5 V TTL-level interface, 9600 bps, 8 data
		  bits, no parity, 1 stop bit, non-inverted.

SIN 		Serial input from host. 3.3 V to 5 V TTL-level interface, 9600 bps,
		  data bits, no parity, 1 stop bit, non-inverted.

SP- 		Differential audio amplifier output, bridge-tied load configuration,
	 	  negative side. Connect directly to 8 ohm speaker.

SP+ 		Differential audio amplifier output, bridge-tied load configuration,
		  positive side. Connect directly to 8 ohm speaker.