Datasheet

6 Digital Interface
www.ti.com Digital Interface
It is easy to interface the ADS1672EVM board to multiple control platforms. The P2 connector (Figure 4 ,
Samtec part number SSW-110-22-S-D-VS) provides a convenient digital access to the key ADS1672 I/O
pins. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector
options.
SW1, a 10-position DIP switch (Figure 4 ), gives users the ability to change the setting of the ADS1672
digital configuration pins when the EVM is used as a stand-alone evaluation board. Pull-up/-down resistors
are provided to set the static state of the digital configuration pins. All position settings for SW1 must be
off (factory default state) when the board is configured for use with ADCPro. The ADCPro software uses
the PCS9535 at U5, a remote I
2
C I/O expander at address 32 (20h), to control the configuration pins. In
addition, the pin setting for the SW1 switches must be off when using the I
2
C function for stand-alone
systems. The ADS1672EVM does not support LVDS interface mode; only the standard 3.3V CMOS
interface is supported.
Figure 4. Digital Interface Connectors and Jumpers
SBAU147 – March 2009 ADS1672EVM and ADS1672EVM-PDK User's Guide 7
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