Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 876

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

It is possible to change the update period of synchronous channels while they are enabled. (See 

 and 

To prevent an unexpected update of the synchronous channels registers, the user must use the 

 (PWM_SCUPUPD) to change the update period of synchronous channels while they

are still enabled. This register holds the new value until the end of the update period of synchronous channels (when
UPRCNT is equal to UPR in 

 (PWM_SCUP)) and the end of the current

PWM period, then updates the value for the next period.

Note:

If the update register PWM_SCUPUPD is written several times between two updates, only the last written value 
is taken into account.

Note:

Changing the update period does make sense only if there is one or more synchronous channels and if the 
update method 1 or 2 is selected (UPDM = 1 or 2 in 

End of PWM period and
end of Update Period
of Synchronous Channels

PWM_SCUPUPD Value

User s Writing

PWM_SCUP