Release of a subset of the full IO. This release includes;
* Power pads;
- High voltage - `top_power_hvc_wpad`, `top_ground_hvc_wpad`
- Low voltage - `top_power_lvc_wpad`, `top_ground_lvc_wpad`
* Reference generators - `top_refgen`, `top_refgen_new`.
* Standard GPIO (`top_gpiov2`).
* I2C compatible GPIO with over-voltage tolerance (`top_gpio_ovtv2`).
* Special SIO (`top_sio`) with differential macro (`top_sio_macro`).
* System wide reset influencing XRES cell (`top_xres4v2`).
Future release will include;
* Original standard GPIO (`top_gpio`).
* More power pad versions.
* More XRES cells.
* More reference generators (`top_vrefcapv2`, etc).
* Spice and CDL models for the IOs.
Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
The SKY130 IO cells is a toolkit IP. It contains all the cells and
primitives required to construct an I/O ring in the SKY130 technology.
This sky130_fd_io library contained in this document covers different
kinds of I/O cells,
* a general purpose I/O (`sky130_fd_io__gpio`), and
* a special I/O (`sky130_fd_io__sio`),
* a reference generator (`sky130_fd_io__refgen`) for providing voltage
references to the `sky130_fd_io__sio`, and
* Power and Ground (PG) cells that make up the I/O ring.
Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
Tim 'mithro' Ansell