AT91M40400-25C ATMEL Corporation, AT91M40400-25C Datasheet - Page 114

• Manufacturer Part Number: AT91M40400-25C
• Description: 16/32-bit Microcontroller, 2.7V to 3.6V Operating Range
• Manufacturer: ATMEL Corporation

Reset Status Register
Register Name:
Access Type:
•
SF Protect Mode Register
Register Name:
Access Type:
Reset Value:
•
•
Reset
0x6C
0x53
114
RESET: Reset Status Information
This field indicates whether the reset was demanded by the external system (via NRST) or by the Watchdog internal
reset request.
PMRKEY: Protect Mode Register Key
Used only when writing SF_PMR. PMRKEY is reads 0.
0x27A8: Write access in SF_PMR is allowed.
Other value: Write access in SF_PMR is prohibited.
AIC: AIC Protect Mode Enable
0 = The Advanced Interrupt Controller runs in Normal Mode.
1 = The Advanced Interrupt Controller runs in Protect Mode.
See Protect Mode on page 37.
31
23
15
31
23
15
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7
7
Cause of Reset
External Pin
Internal Watchdog
AT91M40400
30
22
14
30
22
14
SF_RSR
Read only
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SF_PMR
Read/Write
0
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6
6
AIC
29
21
13
29
21
13
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5
5
28
20
12
28
20
12
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4
4
PMRKEY
PMRKEY
RESET
27
19
11
27
19
11
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3
3
26
18
10
26
18
10
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2
2
25
17
25
17
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9
1
9
1
24
16
24
16
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8
0
8
0