Motorola M12 Oncore User's Guide download pdf (Page 9)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

M12+ AND M12+ TIMER ONCORE RECEIVER ELECTRICAL

CONNECTIONS

The M12+ and M12+ Timer 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 3.1: Oncore Power/Data Connector Pin Assignments

Pin # Signal Name Description

1 TTL TXD1 Transmit 3V logic

2 TTL RXD1 Receive 3V logic

3 +3V PWR Regulated main power

4 1PPS One per pulse per second signal

5 GROUND Ground (receiver)

6 BATTERY Externally applied backup power

7 Reserved Not currently used

8 RTCM IN RTCM input only

9 Antenna Voltage 3 V to 5 V antenna input voltage

10 Reserved Not currently used

Oncore Operation Voltage And Current Ranges

3V PWR (Main power)

Voltage: 2.85V to 3.15V regulated

50 mV peak-to-peak ripple

Current: 0.225 W maximum (without antenna)

BATTERY (Externally applied backup power)

Voltage: 2.2V to 3.2V

Current: 5 uA typical @ 2.7V @25 degC

Retention Backup power retains date, time, position, satellite data,

oscillator learning table and operating mode.

Revision 5.0 08/30/02

3.9

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Motorola M12 Oncore User's Guide Page 9