Option Digital inputs

Option Digital inputs

This option allows the user to acquire additional digital channels synchronous and phasestable along with the analog data.

Therefore the analog data is filled up with the digital bits up to 16 Bit data width. This leads to a possibility of acquiring 4 additional digital bits per channel with 12 bit resolution boards.

Sample format

The following table shows the sample format of the standard mode with the digital inputs disabled and the sample format with activated digital inputs.

Bit

Standard Mode

Digital Inputs enabled

D15

ADx Bit 11

DIGx Bit 3

D14

ADx Bit 11

DIGx Bit 2

 

 

 

D13

ADx Bit 11

DIGx Bit 1

 

 

 

D12

ADx Bit 11

DIGx Bit 0

D11

ADx Bit 11(MSB)

ADx Bit 11(MSB)

 

 

 

D10

ADx Bit 10

ADx Bit 10

 

 

 

D9

ADx Bit 9

ADx Bit 9

D8

ADx Bit 8

ADx Bit 8

 

 

 

D7

ADx Bit 7

ADx Bit 7

 

 

 

D6

ADx Bit 6

ADx Bit 6

D5

ADx Bit 5

ADx Bit 5

 

 

 

D4

ADx Bit 4

ADx Bit 4

 

 

 

D3

ADx Bit 3

ADx Bit 3

D2

ADx Bit 2

ADx Bit 2

 

 

 

D1

ADx Bit 1

ADx Bit 1

 

 

 

D0

ADx Bit 0 (LSB)

ADx Bit 0 (LSB)

To enable the recording of the digital inputs you simply have to set the according register shown in the table below.

Register

Value

Direction

Description

SPC_READDIGITAL

110100

read/write

Enables the recording of the digital inputs. This is only possible if the option “digital inputs“ is

 

 

 

installed on the board.

Due to technical issues there is a board dependant fixed delay between the analog and digital samples. The delay for your type of board can be found in the technical data section.

(c) Spectrum GmbH

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Spectrum Brands MC.31XX Option Digital inputs, Sample format, Bit Standard Mode Digital Inputs enabled, Spcreaddigital