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[Doc] Add testing waveform example to documentation

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tangxifan 2020-12-11 17:24:28 -07:00
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DOC/source/datasheet/sofa_hd/figures/sofa_hd_embedded_io_test_waveform.svg Normal file
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DOC/source/datasheet/sofa_hd/sofa_hd_circuit_design.rst
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@ -35,6 +35,21 @@ The truth table of the I/O cell is consistent with the GPIO cell of Caravel SoC
Schematic of embedded I/O cell used in FPGA Schematic of embedded I/O cell used in FPGA
:numref:`fig_sofa_hd_embedded_io_test_waveform` shows an example waveform about how the I/O cell works:
- When ``IO_ISOL_N`` is enabled/disabled
- When operates in input mode
- When operates in output mode
.. _fig_sofa_hd_embedded_io_test_waveform:
.. figure:: ./figures/sofa_hd_embedded_io_test_waveform.svg
:scale: 30%
:alt: Schematic of embedded I/O cell used in FPGA
An example of waveforms of embedded I/O cell used in FPGA
.. _sofa_hd_circuit_design_mux: .. _sofa_hd_circuit_design_mux:
Multiplexer Multiplexer