SAM4L Datasheet, PDF (174/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
12.7.8 32KHz Oscillator Control Register
Name:
Access Type:
Reset Value:
OSCCTRL32
Read/Write
0x00000004
31
30
29
28
RESERVED
-
-
-
23
22
21
20
-
-
-
-
15
14
13
12
SELCURR[3:0]
7
6
5
4
-
-
-
-
Note: This register is only reset by Power-On Reset
• RESERVED
This bit must always be written to zero.
• STARTUP: Oscillator Start-up Time
Select start-up time for 32 KHz oscillator
27
-
19
-
11
-
3
EN1K
26
25
24
-
-
-
18
17
16
STARTUP[2:0]
10
9
8
MODE[2:0]
2
EN32K
1
0
-
OSC32EN
Table 12-4. Start-up Time for 32 KHz Oscillator
STARTUP
Number of RCSYS Clock
Cycle
Approximative Equivalent Time
(RCOSC = 115 kHz)
0
0
0
1
128
1.1 ms
2
8192
72.3 ms
3
16384
143 ms
4
65536
570 ms
5
131072
1.1 s
6
262144
2.3 s
7
524288
4.6 s
• SELCURR: Current Selection
42023C–SAM–02/2013
174