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// SPDX-FileCopyrightText: 2020 Efabless Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
Pad Instance Clamp connections
DRN1 SRC1 DRN2 SRC2 B2B
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sky130_ef_io__vddio_hvc_pad \mgmt_vddio_hvclamp_pad[0] vddio, vssio
sky130_ef_io__vddio_hvc_pad \mgmt_vddio_hvclamp_pad[1] vddio, vssio
sky130_ef_io__vssio_hvc_pad \mgmt_vssio_hvclamp_pad[0] vddio, vssio
sky130_ef_io__vssio_hvc_pad \mgmt_vssio_hvclamp_pad[1] vddio, vssio
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sky130_ef_io__vdda_hvc_pad mgmt_vdda_hvclamp_pad vdda, vssa
sky130_ef_io__vssa_hvc_pad mgmt_vssa_hvclamp_pad vdda, vssa
sky130_ef_io__vdda_hvc_pad user1_vdda_hvclamp_pad vdda1, vssa1
sky130_ef_io__vssa_hvc_pad user1_vssa_hvclamp_pad vdda1, vssa1
sky130_ef_io__vdda_hvc_pad user2_vdda_hvclamp_pad vdda2, vssa2
sky130_ef_io__vssa_hvc_pad user2_vssa_hvclamp_pad vdda2, vssa2
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sky130_ef_io__vccd_lvc_pad mgmt_vccd_lvclamp_pad vccd, vssio, vccd, vssd, vssa
sky130_ef_io__vssd_lvc_pad mgmt_vssd_lvclmap_pad vccd, vssio, vccd, vssd, vssa
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sky130_ef_io__vccd_lvc_pad user1_vccd_lvclamp_pad vccd1, vssd1, vccd1, vssd, vssio
sky130_ef_io__vssd_lvc_pad user1_vssd_lvclmap_pad vccd1, vssd1, vccd1, vssd, vssio
sky130_ef_io__vccd_lvc_pad user2_vccd_lvclamp_pad vccd2, vssd2, vccd2, vssd, vssio
sky130_ef_io__vssd_lvc_pad user2_vssd_lvclmap_pad vccd2, vssd2, vccd2, vssd, vssio
-----------------------------------------------------------------------------------------
Overlay types used:
1. hvc_pad: vddio -> vssio
2. hvc_pad vdda -> vssa
3. lvc_pad vccd -> vssio, vccd -> vssd vssa
4. lvc_pad vccd -> vssd, vccd -> vssdG vssio
NOTE: Type (4) crosses domains, so that the local VCCD has a diode to the
local VSSD and also to the global VSSD. BUT: Although vccd goes all the way
around the chip in the form of vcchib, vssd does not, which makes the SRC2
connection effectively unreachable in this configuration, so better to just
change it to vssd1 and vssd2 for the respective domains.