Digi International NS9210 Manual

A SERVICE OF

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50 NS9210 Processor Module Hardware Reference

Chapter 2

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I

2

C interface

I

2

C header The I²C interface has only one device connected to the bus on the development

board - an I/O expander (see next paragraph). Otherwise, additional I²C devices

(like EEPROMs) can be connected to the module by using I²C header X15. The

pinning of this header is provided below.

I

2

C digital I/O

expansion

The development board provides a 3.81mm (1.50") green terminal block, X44, for

additional digital I/Os. The I

2

C I/O port chip is on-chip ESD-protected, 5V tolerant,

and provides an open drain

interrupt output.

I2C digital I/Os, X44I2C header, X15

Pin Signal

1 I2C_SDA/GPIO103

2 +3.3V

3 I2C_SCL/GPIO102

4 GND