Datasheet

Table Of Contents

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Hardware Overview

2.2.1.7 J6 (25-Pin Male DSUB)

Table 9 shows the signals connected to J6 on the Interface Board. J6 is used to connect the SPI interface

and 5.0-V power supply from the USB DAQ to the Interface Board.

Table 9. J6 Pinout (25-Pin Male DSUB)

Pin Name Description Used

1 DAC_A DAC_A output No

2 DAC_B DAC_B output No

3 DAC_C DAC_C output No

4 DAC_D DAC_D output No

5 ADS1_VIN+ ADS1 positive input No

6 ADS1_VIN– ADS1 negative input No

7 ADS2_VIN+ ADS2 positive input No

8 ADS2_VIN– ADS2 negative input No

9 I2C_SCK I

C clock No

10 I2C_SDA I

C data No

11 ONE_WIRE One-wire communication line No

12 I2C_SDA_ISO I

C data (isolated) No

13 I2C_SCK_ISO I

C clock (isolated) No

14 XTR +LOOP Current-loop high-side input No

15 XTR –LOOP Current-loop low-side input No

16 INA– INA negative input No

17 VDUT Selectable 3.3-V or 5.0-V power supply No

18 VCC 5.0-V power supply Yes

19 +15V +15-V power supply No

20 –15V –15-V power supply No

21 GND Ground Yes

22 SPI_SCK SPI clock, channel 1 Yes

23 SPI_CS1 SPI chip select, channel 1 Yes

24 SPI_DOUT SPI data output, channel 1 Yes

25 SPI_DIN1 SPI data input, channel 1 Yes

2.2.1.8 J7 (SPI)

Table 10 shows the signals connected to J7 on the Interface Board. J7 is used to connect the SPI

interface to an external XTR108 system.

Table 10. J7 Pinout (SPI)

Pin Name Description

1 DIO SPI data input/output

2 SCK SPI clock

3 CS1 SPI chip select

SBOU123–March 2012 XTR108EVM-USB Evaluation Board and Software Tutorial

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