Manual

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
––––––––
76543210
–––––––SHDW