12.6.1 Write Control

Note: Refer to Configuration Summary chapter for the list of peripherals or instances of the peripherals present in each variant.

Name:	WRCTRL
Offset:	0x00
Reset:	0x00000000
Property:	–


Bit	31	30	29	28	27	26	25	24

Access
Reset


Bit	23	22	21	20	19	18	17	16
	KEY[7:0]
Access	RW	RW	RW	RW	RW	RW	RW	RW
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	PERID[15:8]
Access	RW	RW	RW	RW	RW	RW	RW	RW
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	PERID[7:0]
Access	RW	RW	RW	RW	RW	RW	RW	RW
Reset	0	0	0	0	0	0	0	0

Bits 23:16 – KEY[7:0] Peripheral Access Control Key

These bits define the peripheral access control key:

Value	Name	Description
0x0	OFF	No action
0x1	CLR	Clear the peripheral write control
0x2	SET	Set the peripheral write control
0x3	SETLCK	Set and lock the peripheral write control until the next hardware reset

Bits 15:0 – PERID[15:0] Peripheral Identifier

The PERID represents the peripheral whose control is changed using the WRCTRL.KEY.

Note: Refer to the Configuration Summary chapter for the list of peripherals and peripheral instances present in each variant.

Table 12-1. Peripheral Identifier
Peripheral	Identifier
APBA Peripherals
PAC	0
PM	1
MCLK	2
RSTC	3
OSCCTRL	4
OSC32KCTRL	5
SUPC	6
GCLK	7
WDT	8
RTC	9
EIC	10
FREQM	11
MCRAMC	12
APBB Peripherals
PORT	32
DSU	33
NVMCTRL	34
DMAC	35
MTB	36
APBC Peripherals
EVSYS	64
SERCOM0	65
SERCOM1	66
SERCOM2	67
SERCOM3	68
SERCOM4	69
SERCOM5	70
CAN0	71
CAN1	72
TCC0	73
TCC1	74
TCC2	75
TC0	76
TC1	77
TC2	78
TC3	79
TC4	80
ADC0	81
ADC1	82
AC	83
DAC	84
PTC	85
CCL	86
ICM	89
PDEC	90
SMBIST	91
APBD Peripherals
SERCOM6	96
SERCOM7	97
TC5	98
TC6	99
TC7	100

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