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

[HDL] Critical Patch on the digital I/O cell which now outputs 'Z' when input mode is selected

This commit is contained in:
tangxifan 2020-12-11 10:59:28 -07:00
parent 9c80a1b1a7
commit c1cdca61b5
1 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
HDL/common/digital_io_hd.v
View File

@ -32,25 +32,30 @@ module EMBEDDED_IO_HD (
);
wire SOC_DIR_N;
wire SOC_DIR_WIRE;
// Use drive-strength 4 for a high fan-out from SoC components
sky130_fd_sc_hd__or2b_4 ISOL_EN_GATE (.B_N(IO_ISOL_N),
sky130_fd_sc_hd__or2b_1 ISOL_EN_GATE (.B_N(IO_ISOL_N),
.A(FPGA_DIR),
.X(SOC_DIR)
.X(SOC_DIR_WIRE)
);
sky130_fd_sc_hd__ebufn_4 DIR_PROTECT_GATE (.TE_B(SOC_DIR),
.A(SOC_DIR),
.Z(SOC_DIR)
);
// Use drive-strength 4 for a high fan-out from global routing architecture
sky130_fd_sc_hd__inv_1 INV_SOC_DIR (.A(SOC_DIR), .Y(SOC_DIR_N));
sky130_fd_sc_hd__inv_1 INV_SOC_DIR (.A(SOC_DIR_WIRE), .Y(SOC_DIR_N));
sky130_fd_sc_hd__ebufn_4 IN_PROTECT_GATE (.TE_B(SOC_DIR_N),
.A(SOC_IN),
.Z(FPGA_IN)
);
);
// Use drive-strength 4 for a potential high fan-out from SoC components
sky130_fd_sc_hd__ebufn_4 OUT_PROTECT_GATE (.TE_B(SOC_DIR),
sky130_fd_sc_hd__ebufn_4 OUT_PROTECT_GATE (.TE_B(SOC_DIR_WIRE),
.A(FPGA_OUT),
.Z(SOC_OUT)
);
);
endmodule