Datasheet

27.7.1 Write Control
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
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 following formula:
 = 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 Bridge Number:
Table 27-2. PERID Values
Periph. Bridge Name BridgeNumber PERID Values
A 0 0+N
B 1 32+N
C 2 64+N
SAM D5x/E5x Family Data Sheet
PAC - Peripheral Access Controller
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 732