mirror of https://github.com/efabless/caravel.git
56 lines
1.2 KiB
Coq
56 lines
1.2 KiB
Coq
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// SPDX-FileCopyrightText: 2020 Efabless Corporation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// SPDX-License-Identifier: Apache-2.0
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// Module xres_buf is a level-shift buffer between the xres pad (used for
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// digital reset) and the caravel chip core. The xres pad output is in
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// the 3.3V domain while the signal goes to the digital circuitry in the
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// 1.8V domain.
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module xres_buf (
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X ,
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A ,
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`ifdef USE_POWER_PINS
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VPWR ,
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VGND ,
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LVPWR,
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LVGND,
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`endif
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);
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output X ;
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input A ;
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`ifdef USE_POWER_PINS
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inout VPWR ;
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inout VGND ;
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inout LVPWR;
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inout LVGND;
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`endif
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sky130_fd_sc_hvl__lsbufhv2lv_1 lvlshiftdown (
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`ifdef USE_POWER_PINS
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.VPWR(VPWR),
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.VPB(VPWR),
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.LVPWR(LVPWR),
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.VNB(VGND),
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.VGND(VGND),
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`endif
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.A(A),
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.X(X)
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);
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endmodule
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