C8051F710-GQR Silicon Labs, C8051F710-GQR Datasheet - Page 176
C8051F710-GQR
Manufacturer Part Number
C8051F710-GQR
Description
8-bit Microcontrollers - MCU 8kB ADC Cap Sense
Manufacturer
Silicon Labs
Datasheet
1.C8051F709-GQR.pdf
(306 pages)
Specifications of C8051F710-GQR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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Quantity
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Part Number:
C8051F710-GQR
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Silicon Laboratories Inc
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10 000
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C8051F70x/71x
SFR Definition 27.4. OSCXCN: External Oscillator Control
SFR Address = 0xB5; SFR Page = F
176
Name
Reset
6:4
2:0
Bit
Type
7
3
Bit
XOSCMD[2:0] External Oscillator Mode Select.
XFCN[2:0]
XTLVLD
XTLVLD
Unused
Name
R
7
0
Crystal Oscillator Valid Flag.
(Read only when XOSCMD = 11x.)
0: Crystal Oscillator is unused or not yet stable.
1: Crystal Oscillator is running and stable.
00x: External Oscillator circuit off.
010: External CMOS Clock Mode.
011: External CMOS Clock Mode with divide by 2 stage.
100: RC Oscillator Mode.
101: Capacitor Oscillator Mode.
110: Crystal Oscillator Mode.
111: Crystal Oscillator Mode with divide by 2 stage.
Read = 0; Write = Don’t Care
External Oscillator Frequency Control Bits.
Set according to the desired frequency for Crystal or RC mode.
Set according to the desired K Factor for C mode.
XFCN
000
001
010
100
101
110
011
111
6
0
XOSCMD[2:0]
590 kHz f 1.5 MHz
225 kHz f 590 kHz
10 MHz f 30 MHz
84 kHz f 225 kHz
1.5 MHz f 4 MHz
4 MHz f 10 MHz
32 kHz f 84 kHz
Crystal Mode
R/W
5
0
f 32 kHz
Rev. 1.0
4
0
1.6 MHz f 3.2 MHz
100 kHz f 200 kHz
200 kHz f 400 kHz
400 kHz f 800 kHz
800 kHz f 1.6 MHz
50 kHz f 100 kHz
25 kHz f 50 kHz
Function
R
3
0
f 25 kHz
RC Mode
2
0
XFCN[2:0]
K Factor = 1590
K Factor = 0.87
R/W
K Factor = 180
K Factor = 664
K Factor = 2.6
K Factor = 7.7
K Factor = 22
K Factor = 65
1
0
C Mode
0
0
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