Idle channel register. This register returns the number of the first idle channel.
| RESERVED | Reserved. |
| CHAN | Idle channel. Reading the CHAN bits, returns the lowest idle timer channel. If all timer channels are running, CHAN = 4. To make sure that all outstanding interrupt requests have been serviced, a channel is considered idle only when both the corresponding RUN bit and the interrupt flag are zero in the STATUS register. |
| RESERVED | Reserved. |