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# 1.2.1.11 SYS_MODULE_INDEX Typedef

## C

    typedef unsigned short int SYS_MODULE_INDEX;

## Summary

Identifies which instance of a system module should be initialized or opened.

## Description

This data type identifies to which instance of a system module a call to that module's "Initialize" and "Open" routines refers.

## Remarks

Each individual module will usually define macro names for the index values it supports (e.g., DRV_USART_INDEX_1, DRV_USART_INDEX_2, ...).