SAM4L Datasheet, PDF (175/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
Select current driven into the crystal.
Table 12-5. Crystal Current selection
SELCURR Current Value (nA)
0
50
1
75
2
100
3
125
4
150
5
175
6
200
7
225
8
250
9
275
10
300 (recommended value)
11
325
12
350
13
375
14
400
15
425
• MODE: Oscillator Mode
Table 12-6.
MODE
0
1
2
3
4
5
6
7
Operation Mode for 32 KHz Oscillator
Description
External clock connected to XIN32
Crystal mode. Crystal is connected to XIN32/XOUT32.
Reserved
Crystal mode with amplitude controlled mode. Crystal is connected to XIN32/XOUT32.
Crystal and high current mode. Crystal is connected to XIN32/XOUT32.
Crystal with high current mode and amplitude controlled mode. Crystal is connected to XIN32/XOUT32.
Reserved
Reserved
• EN1K: 1 KHz output Enable
0: The 1 KHz output is disabled.
1: The 1 KHz output is enabled.
• EN32K: 32 KHz output Enable
0: The 32 KHz output is disabled.
1: The 32 KHz output is enabled.
• OSC32EN: 32 KHz Oscillator Enable
0: The 32 KHz Oscillator is disabled
42023C–SAM–02/2013
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