31.7.19 Security Attribution Check

Important: This register is only available for PIC32CM LS00/LS60 and has no effect for PIC32CM LE00.

This register allows the user to select one or more pins to check their security attribution as non-secured.

Tip: The I/O pins are assembled in pin groups (”PORT groups”) with up to 32 pins. Group 0 consists of the PA pins, group 1 is for the PB pins, etc. Each pin group has its own PORT registers, with a 0x80 address spacing. For example, the register address offset for the Data Direction (DIR) register for group 0 (PA00 to PA31) is 0x00, and the register address offset for the DIR register for group 1 (PB00 to PB31) is 0x80.

Name:	NSCHK
Offset:	0x70
Reset:	0x00000000
Property:	PAC Write-Protection


Bit	31	30	29	28	27	26	25	24
	NSCHK[31:24]
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	23	22	21	20	19	18	17	16
	NSCHK[23:16]
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
	NSCHK[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
	NSCHK[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 31:0 – NSCHK[31:0] Port Security Attribution Check

These bits select the individual pins for security attribution check. If any pin selected in NSCHK has the corresponding bit in NONSEC set to the opposite value, then the NSCHK interrupt flag will be set.

Value	Description
0	0-to-1 transition will be detected on corresponding NONSEC bit.
1	1-to-0 transition will be detected on corresponding NONSEC bit.