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NRF52811-QCAA-R 데이터시트(PDF) 72 Page - Nordic Semiconductor

부품명 NRF52811-QCAA-R
상세설명  nRF52811
PDF  444 Pages
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제조업체  NORDIC [Nordic Semiconductor]
홈페이지  https://www.nordicsemi.com/
Logo NORDIC - Nordic Semiconductor

NRF52811-QCAA-R 데이터시트(HTML) 72 Page - Nordic Semiconductor

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Power and clock management
Bit number
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ID
C B
A A
Reset 0x00000000
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ID
Access
Field
Value ID
Value
Description
A
RW SRC
Clock source
RC
0
32.768 kHz RC oscillator
Xtal
1
32.768 kHz crystal oscillator
Synth
2
32.768 kHz synthesized from HFCLK
B
RW BYPASS
Enable or disable bypass of LFCLK crystal oscillator with
external clock source
Disabled
0
Disable (use with Xtal or low-swing external source)
Enabled
1
Enable (use with rail-to-rail external source)
C
RW EXTERNAL
Enable or disable external source for LFCLK
Disabled
0
Disable external source (use with Xtal)
Enabled
1
Enable use of external source instead of Xtal (SRC needs to
be set to Xtal)
5.4.3.20 CTIV ( Retained )
Address offset: 0x538
This register is a retained register
Calibration timer interval
Bit number
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ID
A A A A A A A
Reset 0x00000000
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ID
Access
Field
Value ID
Value
Description
A
RW CTIV
Calibration timer interval in multiple of 0.25 seconds.
Range: 0.25 seconds to 31.75 seconds.
5.4.4 Electrical specification
5.4.4.1 64 MHz internal oscillator (HFINT)
Symbol
Description
Min.
Typ.
Max.
Units
fNOM_HFINT
Nominal output frequency
64
MHz
fTOL_HFINT
Frequency tolerance
<±1.5
<±8
%
tSTART_HFINT
Startup time
3
us
5.4.4.2 64 MHz crystal oscillator (HFXO)
Symbol
Description
Min.
Typ.
Max.
Units
fNOM_HFXO
Nominal output frequency
64
MHz
fXTAL_HFXO
External crystal frequency
32
MHz
fTOL_HFXO
Frequency tolerance requirement for 2.4 GHz proprietary
radio applications
±60
ppm
fTOL_HFXO_BLE
Frequency tolerance requirement, Bluetooth low energy
applications
±40
ppm
CL_HFXO
Load capacitance
12
pF
C0_HFXO
Shunt capacitance
7
pF
4454_140 v1.0
72



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