User`s guide

Signal Connections
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19
Legend:
Signal Name Reference Direction Description
AIGND -------- --------
Analog ground for AI. All three ground
references (AIGND, AOGND, and DGND)
are connected together on board
AI<0..16/95> AIGND Input
Analog Input Channels 0 - 16. Each channel
pair, AI<i, i+8> (I=0..7) can be configured
either two single-ended inputs or one
differential input pair(marked as AIH<0..8>
and AIL<0..8>)
AISENSE AIGND Input
Analog Input Sense. This pin is the
reference for any channels AI<0..16> in
NRSE input configuration
EXTATRIG AIGND Input External AI analog trigger
DA0OUT AOGND Output AO channel 0
DA1OUT AOGND Output AO channel 1
AOEXTREF AOGND Input External reference for AO channels
AOGND -------- -------- Analog ground for AO
EXTWFTRIG DGND Input External AO waveform trigger
EXTDTRIG DGND Input External AI digital trigger
RESERVED -------- Output Reserved. Please leave it open
GPTC<0,1>_SRC DGND Input Source of GPTC<0,1>
GPTC<0,1>_GATE DGND Input Gate of GPTC<0,1>
GPTC<0,1>_OUT DGND Input Output of GPTC<0,1>
GPTC<0,1>_UPDOWN DGND Input Up/Down of GPTC<0,1>
EXTTIMEBASE DGND Input External Timebase
DGND -------- -------- Digital ground
PB<7,0> DGND PIO* Programmable DIO of 8255 Port B
PC<7,0> DGND PIO* Programmable DIO of 8255 Port C
PA<7,0> DGND PIO* Programmable DIO of 8255 Port A
AFI0 DGND Input
Auxiliary Function Input 0
(ADCONV, AD_START)
AFI1 DGND Input
Auxiliary Function Input 1
(DAWR, DA_START)
Table 7: Legend of 68-pin VHDCI-type connectors