6 shutdown controller (shdwc) user interface, 1 register mapping, 2 shutdown control register – Rainbow Electronics AT91CAP9S250A User Manual
Page 123
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123
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
19.6
Shutdown Controller (SHDWC) User Interface
19.6.1
Register Mapping
19.6.2
Shutdown Control Register
Register Name:
SHDW_CR
Access Type:
Write-only
• SHDW: Shutdown Command
0 = No effect.
1 = If KEY is correct, asserts the SHDN pin.
• KEY: Password
Should be written at value 0xA5. Writing any other value in this field aborts the write operation.
Table 19-2.
Shutdown Controller (SHDWC) Registers
Offset
Register Name
Access
Reset
Value
0x00
Shutdown Control Register
SHDW_CR
Write-only
-
0x04
Shutdown Mode Register
SHDW_MR
Read-Write
0x0000 0103
0x08
Shutdown Status Register
SHDW_SR
Read-only
0x0000_0000
31
30
29
28
27
26
25
24
KEY
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
SHDW
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