Motorola Oncore

Pin # 	Signal Name Description

1 	BATTERY Externally applied backup power ( + 5 V)
2 	+5V PWR +5 V regulated main power
3 	GROUND Ground (receiver)
4 	VPP Flash memory programming voltage
5 	RTCM IN RTCM input
6 	1PPS One pulse per second signal
7 	1PPS RTN One pulse per second return
8 	TTL TXD Transmit 5V logic
9 	TTL RXD Receive 5V logic
10 	TTL RTN Transmit/receive return