Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données
Codes de produits
ATSAMD21-XPRO
174
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
16.8.6 32kHz External Crystal Oscillator (XOSC32K) Control
Name:
XOSC32K
Offset:
0x14
Reset:
0x0080
Property:
Write-Protected
z
Bits 15:13 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z
Bit 12 – WRTLOCK: Write Lock
This bit locks the XOSC32K register for futur writes to fix the XOSC32K configuration.
0: The XOSC32K configuration is not locked.
1: The XOSC32K configuration is locked.
This bit locks the XOSC32K register for futur writes to fix the XOSC32K configuration.
0: The XOSC32K configuration is not locked.
1: The XOSC32K configuration is locked.
z
Bit 11 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
z
Bits 10:8 – STARTUP[2:0]: Oscillator Start-Up Time
These bits select the start-up time for the oscillator according to
These bits select the start-up time for the oscillator according to
.
The OSCULP32K oscillator is used to clock the start-up counter.
Bit
15
14
13
12
11
10
9
8
WRTLOCK
STARTUP[2:0]
Access
R
R
R
R/W
R
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
ONDEMAND
RUNSTDBY
AAMPEN
EN1K
EN32K
XTALEN
ENABLE
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
Reset
1
0
0
0
0
0
0
0