Intel® Arria® 10 Hard Processor System Technical Reference Manual

ID 683711
Date 8/28/2023
Public
Document Table of Contents

26.3.4.1. Dedicated Pin MUX Registers

Dedicated pin MUX registers control the functions of the dedicated pins. One register is provided for each dedicated I/O pin.

The HPS provides pin MUX registers, pinmux_dedicated_io_4 through pinmux_dedicated_io_17, for each of the dedicated pins HPS_DEDICATED_4 through HPS_DEDICATED_17. Each pin MUX register contains a 4-bit MUX select field to select the function of the dedicated pin. At a cold reset event these fields are reset to 15, selecting a general purpose I/O function. A warm reset event does not affect these registers.

The registers for dedicated I/O pins HPS_DEDICATED_1 through HPS_DEDICATED_3 provide no functionality, because these pins are always used as the HPS clock and reset pins.

Note: Although the dedicated I/O pins are configured through the control registers, Intel recommends against reconfiguring the dedicated I/O pins after I/O configuration is complete.