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BUF08821EVM-USB Hardware Setup

2.2 Signal Definitions of J1 (25-Pin Male DSUB)

Table 2 lists the different signals connected to J1 on the BUF08821EVM-USB test board.

Table 2. Signal Definition of J1 (25-Pin Male DSUB) on BUF08821EVM-USB

Board

PIN on J1 Signal BUF08821 Pin

1 N/C No connection

2 N/C No connection

3 N/C No connection

4 N/C No connection

5 N/C No connection

6 N/C No connection

7 N/C No connection

8 N/C No connection

9 I2C_SCK No connection

10 I2C_SDA2 No connection

11 N/C No connection

C clock signal (SCL) channel 1; can be

12 I2C_SCK_ISO

disconnected using a switch

C data signal (SDA) channel 1; can be

13 I2C_SDA_ISO

disconnected using a switch

14 N/C No connection

15 N/C No connection

16 N/C No connection

Switched 3V/5V power. Note that when

17 V

DUT

power is switched off, digital I/O is also

switched off.

18 V

No connection

19 N/C No connection

20 N/C No connection

21 GND Common ground connection

22 SPI_SCK No connection

23 SPI_CS1 No connection

24 SPI_DOUT1 No connection

25 SPI_DIN1 No connection

SBOU095–March 2011 BUF08821EVM-USB User Guide and Software Tutorial

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