riscv
/
SOFA
mirror of https://github.com/lnis-uofu/SOFA.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

[Doc] Add guidelines for setting unuses I/Os

This commit is contained in:
tangxifan 2020-11-18 11:50:21 -07:00
parent 4837e6d424
commit da0469728b
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
DOC/source/arch/io_resource.rst
View File

@ -57,6 +57,11 @@ When the logic analyzer interface is enabled, the FPGA can operate in debug mode
.. note:: The logic analyzer is 128-bit, while 115 bits can drive or be driven by the FPGA I/O. The other 14 bits are connected to internal spots of the FPGA fabric, monitoring critical signal activities of the FPGA in debugging purpose.
.. warning:: If the logic analyzer is not used, please configure both the management SoC and the FPGA as follows:
- all the I/O directionality is set to input mode.
- all the output ports is pulled down to logic ``0``
.. _fig_fpga_io_map_logic_analyzer_mode:
.. figure:: ./figures/fpga_io_map_logic_analyzer_mode.png