From b38a948a564d36a2f34fd2cb072195739ca26529 Mon Sep 17 00:00:00 2001 From: tangxifan Date: Fri, 11 Dec 2020 17:24:28 -0700 Subject: [PATCH] [Doc] Add testing waveform example to documentation --- .../figures/sofa_hd_embedded_io_test_waveform.svg | 4 ++++ .../datasheet/sofa_hd/sofa_hd_circuit_design.rst | 15 +++++++++++++++ 2 files changed, 19 insertions(+) create mode 100644 DOC/source/datasheet/sofa_hd/figures/sofa_hd_embedded_io_test_waveform.svg diff --git a/DOC/source/datasheet/sofa_hd/figures/sofa_hd_embedded_io_test_waveform.svg b/DOC/source/datasheet/sofa_hd/figures/sofa_hd_embedded_io_test_waveform.svg new file mode 100644 index 0000000..d5061c6 --- /dev/null +++ b/DOC/source/datasheet/sofa_hd/figures/sofa_hd_embedded_io_test_waveform.svg @@ -0,0 +1,4 @@ + + + +CLKIO_ISOL_NFPGA_DIRSOC_DIRSOC_INFPGA_INFPGA_OUTSOC_OUT \ No newline at end of file diff --git a/DOC/source/datasheet/sofa_hd/sofa_hd_circuit_design.rst b/DOC/source/datasheet/sofa_hd/sofa_hd_circuit_design.rst index 7f3105a..b304368 100644 --- a/DOC/source/datasheet/sofa_hd/sofa_hd_circuit_design.rst +++ b/DOC/source/datasheet/sofa_hd/sofa_hd_circuit_design.rst @@ -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 +: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: Multiplexer