OEM7 Installation and Operation User Manual v4
213
APPENDIX E
Receiver Card Interface Examples
The OEM7 receiver cards provide a number of 3.3V CMOS-level I/O pins for status indication and
timing:
l
COMx
: CMOS-level UART ports
l
Ethernet
: 10/100 Ethernet port
l
CAN1
and
CAN2
: CMOS-level CAN ports (external CAN transceivers required)
l
PPS
: Output pulse providing time reference signal (software configurable output rate,
defaults to 1 Pulse Per Second)
l
EVENTx_OUT
: Variable Frequency output (a software-configurable clock output similar to
PPS, off by default). (The EVENT1_OUT signal may also be referred to as an VARF.)
l
PV
: Position Valid (This signal drives high when the receiver has calculated a valid position)
l
EVENTx_IN
: Event inputs (with configurable polarity)
l
USERIO
: A user defined general purpose input or output (OEM729 only)
These I/O require additional ESD protection if they are to be routed to enclosure connectors. A
protection circuit similar to the following examples must be used on any OEM7 CMOS-level sig-
nals that will be routed to an enclosure connector. The ferrite bead and small-value capacitor
provide some immunity to electrostatic discharge events, but also serve to reduce radiated and
conducted emissions from the enclosure.
Содержание OEM719
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Страница 123: ...Chapter 8 NovAtel Firmware and Software OEM7 Installation and Operation User Manual v4 123...
Страница 130: ...APPENDIX A OEM719 Technical Specifications OEM7 Installation and Operation User Manual v4 130 Figure 43 OEM719 Keep outs...
Страница 150: ...APPENDIX B OEM729 Technical Specifications OEM7 Installation and Operation User Manual v4 150 Figure 50 OEM729 Keep outs...
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