at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 149

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

18. Shutdown Controller (SHDWC)
18.1
18.2
Figure 18-1. Shutdown Controller Block Diagram
18.3
18.4
18.4.1
18.5
6249D–ATARM–20-Dec-07
WKUP0
RTT Alarm
Description
Block Diagram
I/O Lines Description
Product Dependencies
Functional Description
Power Management
SYSC_SHMR
WKMODE0
CPTWK0
Shutdown Controller
RTTWKEN
The Shutdown Controller controls the power supplies VDDIO and VDDCORE and the wake-up
detection on debounced input lines.
Table 18-1.
The Shutdown Controller is continuously clocked by Slow Clock. The Power Management Con-
troller has no effect on the behavior of the Shutdown Controller.
The Shutdown Controller manages the main power supply. To do so, it is supplied with VDDBU
and manages wake-up input pins and one output pin, SHDN.
Name
WKUP0
SHDN
SYSC_SHMR
I/O Lines Description
reset
Description
Wake-up 0 input
Shutdown output
reset
set
read SYSC_SHSR
read SYSC_SHSR
WAKEUP0
RTTWK
set
SYSC_SHSR
SYSC_SHSR
AT91SAM9263 Preliminary
SYSC_SHCR
SLCK
SHDW
Wake-up
Shutdown
Shutdown
Controller
Output
Type
Input
Output
SHDN
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