SAM4L Datasheet, PDF (146/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
11.6.8 Power Mode Control Register
Name:
PMCON
Access Type:
Read/Write
Offset:
0x001C
Reset Value:
0x00000000
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
FASTWKUP
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
CK32S
15
14
13
12
11
10
9
8
-
SLEEP
-
-
RET
BKUP
7
6
5
4
3
2
1
0
-
-
-
-
PSCREQ
PS
• FASTWKUP: Fast Wakeup
0: Normal wakeup time for analog modules.
1: Fast wakeup time for analog modules. To have an optimal fast wakeup, this is also required to configure the PM.FASTSLEEP
register to wakeup the system on a Fast RC oscillator clock source. If the flash high speed mode is enabled, the fast wakeup has
no effect.
During the wakeup period, the FLASHCALW module is forced to operate in wait state 1 until the BPM.SR.PSOK bit is one.
• CK32S: 32kHz-1kHz Clock Source Selection
0: the 32kHz and 1kHz clock sources are from the OSC32K.
1: the 32kHz and 1kHz clock sources are from the RC32K.
• SLEEP: SLEEP mode Configuration
Table 11-2.
SLEEP
0
1
2
3
SLEEP mode Configuration
Description
The CPU clock is stopped.
The CPU and AHB clocks are stopped.
The CPU, AHB, PB and GCLK clocks are stopped. Clock sources (OSC, Fast RC Oscillators, PLL, DFLL) are still
running.
The CPU, AHB, PB, GCLK clocks and clock sources (OSC, RCFast, PLL, DFLL) are stopped.
RCSYS is still running. RC32K or OSC32K are still running if enabled.
• RET: RETENTION Mode
0: the Power Save Mode will not be the RETENTION mode.
42023C–SAM–02/2013
146