Datasheet

29.9.1 Control A
Name: CTRLA
Offset: 0x00
Reset: 0x00
Property: PAC Write-Protection
Bit 7 6 5 4 3 2 1 0
SERENx SERENx CKENx CKENx ENABLE SWRST
Access
R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0
Bits 5,4 – SERENx Serializer x Enable [x=1..0]
Writing a '0' to this bit will disable the Serializer x.
Writing a '1' to this bit will enable the Serializer x.
Value Description
0
The Serializer x is disabled.
1
The Serializer x is enabled.
Bits 3,2 – CKENx Clock Unit x Enable [x=1..0]
Writing a '0' to this bit will disable the Clock Unit x.
Writing a '1' to this bit will enable the Clock Unit x.
Value Description
0
The Clock Unit x is disabled.
1
The Clock Unit x is enabled.
Bit 1 – ENABLE Enable
Writing a '0' to this bit will disable the module.
Writing a '1' to this bit will enable the module.
Value Description
0
The peripheral is disabled.
1
The peripheral is enabled.
Bit 0 – SWRST Software Reset
Writing a '0' to this bit has no effect.
Writing a '1' to this bit resets all registers to their initial state, and the peripheral will be disabled.
Writing a '1' to CTRL.SWRST will always take precedence, meaning that all other writes in the same
write-operation will be discarded.
The I2S generic clocks must be enabled before triggering Software Reset, so that the logic in all clock
domains can be reset.
Value Description
0
There is no reset operation ongoing.
1
The reset operation is ongoing.
SAM D21 Family
I2S - Inter-IC Sound Controller
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 645