ETM Main Control Register
| ETMPD | ETM Power Down |
| PORTSIZE | Port Size bits 2:0 |
| STALL | Stall Processor |
| BROUT | Branch Output |
| DBGRQ | Debug Request Control |
| PROG | ETM Programming |
| PORTSEL | ETM Port Select |
| PORTMODE2 | Port Mode bit 2 |
| PORTMODE | Port Mode bits 1:0 |
| PORTSIZE3 | Port Size bit 3 |
| TSEN | TimeStamp Enable |