Motorola M12 Oncore User's Guide download pdf (Page 13)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

GT+, UT+, SL ONCORE RECEIVER ELECTRICAL CONNECTIONS

The Oncore receives electrical power and receives/transmits I/O signals through a

10pin power/data connector mounted on the Oncore Refer to Figure 3.3 for pin

numbering.

The following table lists the assigned signal connections of the Oncore receiver's

power/data connector. For more information, refer to the Active Antenna

Applications Note.

Table 3.3: Oncore Power/Data Connector Pin Assignments

Pin # Signal Name Description

1 BATTERY Externally applied backup power (< + 5V)

2 +5V PWR +5V regulated main power

3 GROUND Ground (receiver)

4 VPP Flash memory programming voltage

5 RTCM IN RTCM input

6 1PPS One per pulse per second signal

7 1PPS RTN One per pulse per second return

8 TTL TXD Transmit 5V logic

9 TTL RXD Receive 5V logic

10 TTL RTN Transmit/receive return

Oncore Operation Voltage And Current Ranges

5V PWR (Main power)

Voltage: 4.75 V to 5.25 V

50 mV peak-to-peak ripple

Current: < 0.9 W at 5 V at 25øC with active antenna drawing 20 mA

BATTERY (Externally applied backup power)

Voltage: 2.5 V to 5.25 V

Current: 5 uA typical @ 2.5 V

100 uA typical @ 5.0 V

Revision 5.0 08/30/02

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Motorola M12 Oncore User's Guide Page 13