I/O Signal Description - Advantech MIC-1816 Series User Manual

2.7

I/O Signal Description

Refer to Figures 1.1 and 1.2 regarding the pin assignments for the terminal blocks.
The I/O connector signal descriptions are provided in Table 2.1.
Table 2.1: I/O Signal Descriptions
Signal Name
AI[15:0]
AGND
ATRG0(AT0)
ATRG1(AT1)
DTRG0(DT0)
DTRG1(DT1)
AI_SCAN(AISC)
AI_CONV(AICV)
AO0_REF(AO0R)
AO1_REF(AO1R)
AO0_OUT(AO0)
AO1_OUT(AO1)
AO_CONV(AOCV)
D[23:0](DIO)
Reference Direction
AGND Input
- -
AGND Input
DGND Input
DGND Input
DGND Input
AGND Input
AGND Output
DGND Input
Input/
DGND
Output
13
Pin Description
AI Channels 0 to 15. Each channel pair,
AI[i+1:i](i=0,2,4...14), can be configured as
either two single-ended inputs or one differ-
ential input.
Analog Ground. These pins are the refer-
ence points for single-ended measurements
and the bias current return point for differen-
tial measurement. The ground references
(AGND and DGND) are connected on MIC-
1816.
Analog Threshold Trigger. These pins are
the analog threshold trigger input.
Digital Trigger. These pins are the digital
input.
The left pins are used to start or stop a data
acquisition.
Analog Threshold Trigger and Digital Trig-
ger are used to execute a specific data
acquisition mode – an acquisition which con-
sists of one or more scans. A data acquisi-
tion behavior needs a stop trigger signal
while the pin is used to stop the function.
The active edge of the start and stop func-
tion can be programmed as rising or falling.
AI Scan Clock. This pin is used to initiate a
set of data acquisition. The card samples the
AI signals of every channel in the scan list
once for every AI Scan Clock.
AI Conversion Clock. This pin is to initiate a
single AI conversion on a single channel. A
scan (controlled by the AI Scan Clock) con-
sists of one or more conversions.
AO Channel 0/1 External Reference. This
is the external reference input for the analog
output channel 0/1.
AO Channels 0/1. This pin supplies the volt-
age output of analog output channel 0/1.
AO Convert Clock. This pin is for initiating
AO conversion. Each sample updates the
output of all DACs. Users can specify an
internal or external source for AO Convert
Clock.
Digital Input/ Output Channel [23:0].
These pins are for digital input/output and
can be configured as general purpose digital
inputs or outputs.
MIC-1816 User Manual