15.7.1 Write Control


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	CLEAR	Clear the peripheral write control
0x2	SET	Set the peripheral write control
0x3	LOCK	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. The Peripheral Identifier is calculated by the following formula:

P E R I D = 32 * BridgeNumber + N

Where BridgeNumber represents the Peripheral Bridge Number (0 for Peripheral Bridge A, 1 for Peripheral Bridge B, etc.). N represents the peripheral index from the respective Peripheral Bridge Number, which can be retrieved in the Peripherals Configuration Summary table:

Table 15-2. PERID Values
Peripheral Bridge Name	BridgeNumber	PERID Values
A	0	0+N
B	1	32+N
C	2	64+N

Name:	WRCTRL
Offset:	0x00
Reset:	0x00000000
Property:	Mix-Secure