AT91SAM9XE_14 Datasheet, PDF (110/846 Pages) ATMEL Corporation – Atmel | SMART ARM-based Embedded MPU

15.4.3 Reset Controller Mode Register
Name:
Address:
RSTC_MR
0xFFFFFD08
Access Type:
Read-write
31
30
29
28
27
26
25
24
KEY
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
BODIEN
15
14
13
12
11
10
9
8
–
–
–
–
ERSTL
7
6
5
4
3
2
1
0
–
–
URSTIEN
–
–
–
URSTEN
• URSTEN: User Reset Enable
0 = The detection of a low level on the pin NRST does not generate a User Reset.
1 = The detection of a low level on the pin NRST triggers a User Reset.
• URSTIEN: User Reset Interrupt Enable
0 = USRTS bit in RSTC_SR at 1 has no effect on rstc_irq.
1 = USRTS bit in RSTC_SR at 1 asserts rstc_irq if URSTEN = 0.
• BODIEN: Brownout Detection Interrupt Enable
0 = BODSTS bit in RSTC_SR at 1 has no effect on rstc_irq.
1 = BODSTS bit in RSTC_SR at 1 asserts rstc_irq.
• ERSTL: External Reset Length
This field defines the external reset length. The external reset is asserted during a time of 2^(ERSTL+1) Slow Clock cycles.
This allows assertion duration to be programmed between 60 µs and 2 seconds.
• KEY: Password
Should be written at value 0xA5. Writing any other value in this field aborts the write operation.
110
AT91SAM9XE Series [DATASHEET]
Atmel-6254D-ATARM-AT91SAM9XE-Datasheet_29-Oct-14