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 |
Peripheral Identifier
The PERID represents the peripheral whose control is changed
using the WRCTRL.KEY. The Peripheral Identifier is calculated by the following
formula:
PERID=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 1. PERID Values
Peripheral Bridge Name |
BridgeNumber |
PERID Values |
A |
0 |
0+N |
B |
1 |
32+N |
C |
2 |
64+N |