35.7.15 Counter Value
Note: Prior to any read access, the user
must synchronize this register by writing the according TCC Command value to the
Control B Set register (CTRLBSET.CMD = READSYNC).
Note: This register is
write-synchronized: SYNCBUSY.COUNT must be checked to ensure the COUNT register
synchronization is complete.
| Name: | COUNT |
| Offset: | 0x34 |
| Reset: | 0x00000000 |
| Property: | PAC Write-Protection, Write-Synchronized |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| COUNT[23:16] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| COUNT[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| COUNT[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bits 23:0 – COUNT[23:0] Counter Value
These bits hold the value of the Counter register.
Note: When the TCC is configured as
16-bit timer/counter, the excess bits are read zero.
Note: This bit field occupies the MSB
of the register, [23:m]. m is dependent on the Resolution bit in the Control A
register (CTRLA.RESOLUTION):
| CTRLA.RESOLUTION | Bits [23:m] |
|---|---|
| 0x0 - NONE | 23:0 (depicted) |
| 0x1 - DITH4 | 23:4 |
| 0x2 - DITH5 | 23:5 |
| 0x3 - DITH6 | 23:6 |