2021-12-16 19:41:16 -06:00
|
|
|
Pad Instance Clamp connections
|
|
|
|
|
DRN1 SRC1 DRN2 SRC2 B2B
|
|
|
|
|
----------------------------------------------------------------------------------------
|
|
|
|
|
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
|
|
|
|
|
-----------------------------------------------------------------------------------------
|
|
|
|
|
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
|
|
|
|
|
-----------------------------------------------------------------------------------------
|
|
|
|
|
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
|
|
|
|
|
-----------------------------------------------------------------------------------------
|
|
|
|
|
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.
|
|
|
|
|
|
|
|
|
|
New overlay types created:
|
|
|
|
|
1. sky130_ef_io__vddio_hvc_clamped_pad: sky130_ef_io__vddio_hvc_pad + overlay (1)
|
|
|
|
|
2. sky130_ef_io__vssio_hvc_clamped_pad: sky130_ef_io__vssio_hvc_pad + overlay (1)
|
|
|
|
|
3. sky130_ef_io__vdda_hvc_clamped_pad: sky130_ef_io__vdda_hvc_pad + overlay (2)
|
|
|
|
|
4. sky130_ef_io__vssa_hvc_clamped_pad: sky130_ef_io__vssa_hvc_pad + overlay (2)
|
|
|
|
|
5. sky130_ef_io__vccd_lvc_clamped_pad: sky130_ef_io__vccd_lvc_pad + overlay (3)
|
|
|
|
|
6. sky130_ef_io__vssd_lvc_clamped_pad: sky130_ef_io__vssd_lvc_pad + overlay (3)
|
|
|
|
|
7. sky130_ef_io__vccd_lvc_clamped2_pad: sky130_ef_io__vccd_lvc_pad + overlay (4)
|
2021-12-21 19:00:29 -06:00
|
|
|
8. sky130_ef_io__vssd_lvc_clamped2_pad: sky130_ef_io__vssd_lvc_pad + overlay (4)
|
|
|
|
|
9. sky130_ef_io__vccd_lvc_clamped3_pad: sky130_ef_io__vccd_lvc_pad + overlay (4)
|
|
|
|
|
10. sky130_ef_io__vssd_lvc_clamped3_pad: sky130_ef_io__vssd_lvc_pad + overlay (4)
|
2021-12-16 19:41:16 -06:00
|
|
|
|
2021-12-21 19:00:29 -06:00
|
|
|
NOTE: The "clamped3" pads correspond to a change in the Caravel design for MPW-2,
|
|
|
|
|
in which the vccd/vssd domain has continuous supply rings around the chip
|
|
|
|
|
periphery. The pad connection of these two pads does not connect to the padframe
|
|
|
|
|
power rings, but connects to a separate set of power rails in the chip core.
|
