Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

Product codes

AT91SAM9N12-EK

156

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

18.

Shutdown Controller (SHDWC)

18.1

Description

The Shutdown Controller controls the power supplies VDDIO and VDDCORE and the wake-up detection on debounced
input lines.

18.2

Embedded Characteristics



Shutdown and Wake-up Logic



Software Assertion of the SHDW Output Pin



Programmable De-assertion from the

WKUP Input Pins

18.3

Block Diagram

Figure 18-1. Shutdown Controller Block Diagram

18.4

I/O Lines Description

Table 18-1. I/O Lines Description

Name

Description

Type

WKUP0

Wake-up 0 input

Input

SHDN

Shutdown output

Output

Shutdown

Wake-up

Shutdown

Output

Controller

SHDN

WKUP0

SHDW

WKMODE0

Shutdown Controller

RTC Alarm

RTCWKEN

SHDW_MR

SHDW_CR

CPTWK0

WAKEUP0

RTCWK

SHDW_SR

set

reset

read SHDW_SR

SLCK