Added a secondary clock output, going to the user area, that is derived
from the 90-degree phase PLL clock and run on an independent divider.
The use of the 90-degree phase clock is mostly to balance the output
loads.
diff --git a/verilog/rtl/mgmt_protect.v b/verilog/rtl/mgmt_protect.v
index 24b9cbc..1b04731 100644
--- a/verilog/rtl/mgmt_protect.v
+++ b/verilog/rtl/mgmt_protect.v
@@ -22,6 +22,7 @@
`endif
input caravel_clk,
+ input caravel_clk2,
input caravel_rstn,
input mprj_cyc_o_core,
input mprj_stb_o_core,
@@ -33,6 +34,7 @@
input [127:0] la_oen,
output user_clock,
+ output user_clock2,
output user_resetn,
output mprj_cyc_o_user,
output mprj_stb_o_user,
@@ -43,9 +45,9 @@
output [127:0] la_data_in_mprj
);
- wire [72:0] mprj_logic1;
+ wire [73:0] mprj_logic1;
- sky130_fd_sc_hd__conb_1 mprj_logic_high [72:0] (
+ sky130_fd_sc_hd__conb_1 mprj_logic_high [73:0] (
`ifdef LVS
.VPWR(vccd1),
.VGND(vssd1),
@@ -80,6 +82,18 @@
.TE(mprj_logic1[1])
);
+ sky130_fd_sc_hd__einvp_8 mprj_clk2_buf (
+ `ifdef LVS
+ .VPWR(vccd),
+ .VGND(vssd),
+ .VPB(vccd),
+ .VNB(vssd),
+ `endif
+ .Z(user_clock2),
+ .A(~caravel_clk2),
+ .TE(mprj_logic1[2])
+ );
+
sky130_fd_sc_hd__einvp_8 mprj_cyc_buf (
`ifdef LVS
.VPWR(vccd),
@@ -89,7 +103,7 @@
`endif
.Z(mprj_cyc_o_user),
.A(~mprj_cyc_o_core),
- .TE(mprj_logic1[2])
+ .TE(mprj_logic1[3])
);
sky130_fd_sc_hd__einvp_8 mprj_stb_buf (
@@ -101,7 +115,7 @@
`endif
.Z(mprj_stb_o_user),
.A(~mprj_stb_o_core),
- .TE(mprj_logic1[3])
+ .TE(mprj_logic1[4])
);
sky130_fd_sc_hd__einvp_8 mprj_we_buf (
@@ -113,7 +127,7 @@
`endif
.Z(mprj_we_o_user),
.A(~mprj_we_o_core),
- .TE(mprj_logic1[4])
+ .TE(mprj_logic1[5])
);
sky130_fd_sc_hd__einvp_8 mprj_sel_buf [3:0] (
@@ -125,7 +139,7 @@
`endif
.Z(mprj_sel_o_user),
.A(~mprj_sel_o_core),
- .TE(mprj_logic1[8:5])
+ .TE(mprj_logic1[9:6])
);
sky130_fd_sc_hd__einvp_8 mprj_adr_buf [31:0] (
@@ -137,7 +151,7 @@
`endif
.Z(mprj_adr_o_user),
.A(~mprj_adr_o_core),
- .TE(mprj_logic1[40:9])
+ .TE(mprj_logic1[41:10])
);
sky130_fd_sc_hd__einvp_8 mprj_dat_buf [31:0] (
@@ -149,7 +163,7 @@
`endif
.Z(mprj_dat_o_user),
.A(~mprj_dat_o_core),
- .TE(mprj_logic1[72:41])
+ .TE(mprj_logic1[73:42])
);
/* The LA buffers are controlled from the user side, so */
