Ouster OS2 - Digital IO; SYNC_PULSE

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Table 4.1 –continuedfromprevious page

NetName PinNumber Wire TwistedWith

TRP_4_P(Ethernet) 12 White/Brown,26AWG Brown

TRP_4_N(Ethernet) 11 Brown,26AWG White/Brown

5 DigitalIO

5.1 SYNC_PULSE_IN

SYNC_PULSE_IN isadedicatedinputchannelthatisaccessiblewithintheInterfaceBoxJumperJ4. This

channel expects an input pulse sequence which can be used for time synchronization. Refer to the

SoftwareUser Manual formore informationon configuring this input. Anyreferencesto pulse polar-

ity in this document references the signal polarity on the SYNC_PULSE_IN pin of the sensor. This input

channelisprotectedbyan opto-isolatorwhichwilldraw5mA atfulloperation.

Table5.1: SYNC_PULSE_INInterfaceRequirements

Parameter MinVoltage MaxVoltage MinDriverCurrent

LOGICLOW -30V 2V N/A

LOGICHIGH 2.9V 30V 3mA @3.3V~5V, 5mA

at24Vandhigher

SYNC_PULSE_IN Interface requirements were tested with 2 m cable Interface Box connection at 2

MHz.

When GPIO has 5 mA drive strength minimum, GPIO can be directly connected to the

SYNC_PULSE_IN pinoftheInterfaceBoxheader. Thisisthemostcommoncaseandhasbeentested

to work on common Arduino microcontroller series. Typical common logic levels of 3.3 V, 5 V

GPIOofmicrocontrollerscanproducedrivestrengthof 5mAmin(Arduino,MSP430,etc.).

If the 5 mA drive strength minimum cannot be met, a buffer circuit is required to drive

SYNC_PULSE_IN.Examplecircuitsareprovidedforcommon3.3Vand 5Vlogic.

Ouster OS2 - Digital IO; SYNC_PULSE_IN