Owners manual

System
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 173
0
R/W
0x0
LOSC_SRC_SEL.
LOSC Clock source Select. ‘N’ is the value of Internal OSC Clock Prescalar
register.
0: InternalOSC /32/ N, 1: External 32.768KHz OSC.
(InternalOSC=16MHz)
Note1: Any bit of [9:7] is set, the RTC HH-MM-SS, YY-MM-DD and ALARM DD-HH-MM-SS register can’t be written.
Note2: Internal OSC is about 16MHz.
4.8.3.2. LOSC Auto Switch Status Register (Default Value: 0x00000000)
Offset:0x4
Register Name: LOSC_AUTO_SWT_STA_REG
Bit
R/W
Default/Hex
Description
31:2
/
/
/
1
R/W
0x0
LOSC_AUTO_SWT_PEND.
LOSC auto switch pending.
0: No effect
1: Auto switches pending
Set 1 to this bit will clear it.
0
RO
0x0
LOSC_SRC_SEL_STA.
Checking LOSC Clock Source Status. ‘N’ is the value of Internal OSC Clock
Prescalar register.
0: InternalOSC /32/ N
1: External 32.768KHz OSC
(InternalOSC=16MHz)
4.8.3.3. Internal OSC Clock Prescalar Register (Default Value: 0x0000000F)
Offset:0x8
Register Name: INTOSC_CLK_PRESCAL_REG
Bit
R/W
Default/Hex
Description
31:16
/
/
/
15:0
R/W
0xF
INTOSC_CLK_PRESCAL.
Internal OSC Clock Prescalar value N.
0x000: 1
0x001: 2
0x002: 3
............
0x1F: 32
4.8.3.4. RTC YY-MM-DD Register (Default Value: 0x00000000)
Offset:0x10
Register Name: RTC_YY_MM_DD_REG
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