sie)The required supervisor interrupt (software, timer, and external
interrupt) can be enabled by setting the appropriate bit in the sie
register described in the following table.
| Bits | Field Name | Attributes | Description |
|---|---|---|---|
| 0 | Reserved | WIRI | — |
| 1 | SSIE | RW | Supervisor Software Interrupt Enable |
| [4:2] | Reserved | WIRI | — |
| 5 | STIE | RW | Supervisor Timer Interrupt Enable |
| [8:6] | Reserved | WIRI | — |
| 9 | SEIE | RW | Supervisor External Interrupt Enable |
| [63:10] | Reserved | WIRI | — |