IC-GD datasheet(46/55 Pages) ICHAUS

46 / 55 page

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iC-GD

UNIVERSAL I/O INTERFACE

Rev A1, Page 46/55

that use the digital input or output, those in- and out-

puts must also be selected in the IO_SEL_xX register –

either as primary or secondary function.

• OUT: The iC operates asynchronously. The input

data is sampled with the falling edge at pin NCS (SPI

access), the output data is set after writing (rising

edge at NCS; the analog outputs are updated after

the next refresh cycle).

• SYNC (DATA): The iC operates synchronously. The

input data is sampled with the rising or falling edge

of the SYNC pin and can be read via SPI at any

time. The output data written via SPI is output then

(the analog outputs are updated after the next refresh

cycle).

• DIG_IN-SYNC_OUT: The digital input data is output

via the SYNC pin after passing the spike filter and

optional inversion. The mode of the digital input is se-

lected via DI_SEL. The primary or secondary function

for the channel must be selected as DI.

• SYNC_IN-DIG_OUT: The digital value at the SYNC

pin is output (optionally inverted) at the digital out-

put. The mode of the digital output is selected via

DO_SEL. The primary or secondary function for the

channel must be selected as DO.

SYNC_SEL_x

LK - /

RW - 00

OFF

SYNC (DATA)

DI → SYNC_PIN

SYNC_PIN → DO

Table 48: SYNC pin function selection

SYNC_INV_x

The register SYNC_INV_x selects the active edge for

synchronizing (for every channel separately). This ap-

plies both to the SYNC pin and the SYNC command

via SPI.

SYNC_INV_x

LK - P

RW - 0

Non inverted: rising edge

Inverted: falling edge

Table 49: SYNC edge selection

VICI_SEL_x

voltage input or the current input respectively. The

setting must correspond to register IO_SEL_x.

When temperature measurement is selected in regis-

ter IO_SEL_xP, it is automatically overwritten with the

voltage range required for the measurement.

VICI_SEL_x

LK-PS

(*) RW - 000

000

±10 V

001

±1 V

010

±100 mV

011

±10 mV

100

-17.5m...87.5 mV

101

-4.375...21.875 mV

110

-20...20 mA

111

4...20 mA

Table 50: Voltage/current input selection

CO_SEL_x

rent output.

When temperature measurement is selected in register

IO_SEL_xP and the PT elements are selected in regis-

ter TM_SEL_x, this register is automatically overwritten

with the selection appropriate for the PT elements to

supply the required current.

CO_SEL_x

LK-PS

(*) RW - 00

0...20 mA

4...20 mA

0...2.0 mA

0...200 µA

Table 51: Current-output selection

VO_EC_x

range of the voltage output (see Item No. M04).

VO_EC_x

LK-PS

(*) RW - 0

Activates the extended current range of VO

Table 52: Current-range extension

Classic counter

The following registers refer to the function of the

counter in classic mode. This register block shares

its functions with other modes. It is only valid, if the

classic counter is selected in register IO_SEL_xP.

If required, register CNT_DCB_x suppresses several

CH_STAT events in consequence of the same trigger.

They can be reactivated in register SPI_LOCK_RESET.

The bit is intended to reduce double interrupts due to a

single event.

CNT_DCB_x

LK - P

RW - 0

Activates the suppression of multiple CH_STAT

events

Table 53: EN_STAT_xP-bits reset

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