15.6.1 Write Control

Important: If BOCOR.SECCFGLOCK == 0 after exiting the Boot ROM, the secure software code of the Flash BOOT region, before passing control on to the secure software code of the Flash APPLICATION region, MUST lock the current security attribution of each peripheral using the SECLOCK command.

Name:	WRCTRL
Offset:	0x00
Reset:	0x00020021
Property:	Mix-Secure


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/RW	RW/RW/RW	RW/RW/RW	RW/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/RW	RW/RW/RW	RW/RW/RW	RW/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/RW	RW/RW/RW	RW/RW/RW	RW/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
0x4	SETSEC	PIC32CM LS00/LS60 only: Set the peripheral as Secure (the NONSEC bit is set to 0) This command is not supported if BOCOR.SECCFGLOCK == 1 after exiting the Boot ROM
0x5	SETNONSEC	PIC32CM LS00/LS60 only: Set the peripheral as Non-Secure (the NONSEC bit is set to 1) This command is not supported if BOCOR.SECCFGLOCK == 1 after exiting the Boot ROM
0x6	SECLOCK	PIC32CM LS00/LS60 only: Lock the current peripheral security attribution until the next reset This command is not supported if BOCOR.SECCFGLOCK == 1 after exiting the Boot ROM

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

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

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

Table 15-2. 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
PORT	12
AC	13
APBB Peripherals
IDAU	32
DSU	33
NVMCTRL	34
DMAC	35
HMATRIXHS	36
USB	37
APBC Peripherals
EVSYS	64
SERCOM0	65
SERCOM1	66
SERCOM2	67
SERCOM3	68
SERCOM4	69
SERCOM5	70
TC0	71
TC1	72
TC2	73
TCC0	74
TCC1	75
TCC2	76
TCC3	77
ADC	78
DAC	79
PTC	80
TRNG	81
CCL	82
I2S	83
OPAMP	84
TRAM	85