The key configuration choices available to each module are as follows:
- Options for SyncIn
- Load own counter with phase register on an incoming sync strobe—enable (EN) switch closed
- Do nothing or ignore incoming sync strobe—enable switch open
- Sync flow-through - SyncOut connected to SyncIn
- Master mode, provides a sync at PWM boundaries—SyncOut connected to CTR = PRD
- Master mode, provides a sync at any programmable point in time—SyncOut connected to CTR = CMPB
- Module is in standalone mode and provides no sync to other modules—SyncOut connected to X (disabled)
- Options for SyncOut
- Sync flow-through - SyncOut connected to SyncIn
- Master mode, provides a sync at PWM boundaries—SyncOut connected to CTR = PRD
- Master mode, provides a sync at any programmable point in time—SyncOut connected to CTR = CMPB
- Module is in standalone mode and provides no sync to other modules—SyncOut connected to X (disabled)
For each choice of SyncOut, a module can
also choose to load the counter with a new phase value on a SyncIn strobe input or choose to
ignore the value (that is, by the enable switch). Although various combinations are
possible, the two most common—Master module and Slave module modes—are shown in Figure 26-59.