# NCT5525D Super I/O

The Super I/O has the ID `0xd293` and the source can be found in
`src/superio/nuvoton/nct5525d/`.

## Logical devices

These logical devices are switched with `device pnp <port>.<ldn> on|off`
below the `chip superio/nuvoton/nct5525d` entry:

| Path | Function                            | `on` / `off` controls |
|------|-------------------------------------|-----------------------|
| `2`  | UART A                              | CR30[0]               |
| `5`  | Keyboard controller                 | CR30[0]               |
| `b`  | Hardware monitor, SMBus master, LED | CR30[0]               |
| `16` | Deep S5                             | LDN 16 CR30[0]        |

Logical devices that aren't in the devicetree are left untouched. Several
settings of this chip, like Deep S5 (`2e.16`), are battery-backed.

## For developers

The Super I/O generates ACPI using the
[SSDT generator for generic SuperIOs](../common/ssdt.md) for the hardware
monitor.