Download dg24 manual - RTD Embedded Technologies, Inc.

Connectingthe Digital VO
For all digital I/O connections,
thehigh sideof an externalsignalsourceor destinariondeviceis connectedto
theappropriate
signalpin on the VO connector,andrhelow sideis connectedo a DIGITAL GND (p6, pins 1,4-10,
and40).
Connectingthe External Interrupt
TheDG24canreceivean extemallygenerated
intemrptsignal,EXTINT, throughI/O connectorp6, pin 1l and
routeit to an IRQ channelthroughon-boardheaderconnectorP3. Intemrptgeneration
is enabledthroughhardware.
Whenintemtptsarcenabled,a risingedgeon theEXTINT line will causetheselectedIRQ line ro go high,andthe
IRQ statusbit will changefrom 0 to l. You musttaketheEXTINT line high until rheintemrptroutineis serviced.
Connectingthe ResetDrv Pin
TheRESETDRV pin (P6-38)canbe usedo connecttheRESETsignalgenerated
by rhePC o external
circui0ry.TheRESETDRV is an activehigh signal(i.e.,theline goeshigh duringa RESETcondition).
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