| word | stack | description |
|---|---|---|
| twi | ( -- ) | enable twi |
| /twi | ( -- ) | disable twi |
| twiwait | ( -- ) | wait for twi operation to complete |
| twistart | ( -- ) | send a start condition |
| twistop | ( -- ) | send a stop condition |
| twitx | ( c -- ) | send byte |
| spirx | ( -- c ) | receive byte, send ack |
| spirxn | ( -- c ) | receive byte, send nack |
| twistat | ( -- c ) | get twi status code |