C8051F411EK Silicon Laboratories Inc, C8051F411EK Datasheet - Page 171

• Manufacturer Part Number: C8051F411EK
• Description: KIT EVAL FOR C8051F411
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F411EK

• Contents: Evaluation Board, CD-ROM, USB Cable, Batteries and User Guide
• Processor To Be Evaluated: C8051F41x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F411
• Silicon Family Name: C8051F41x
• Kit Contents: LCD Based Evaluation Board, USB Cable, Software CD And Quick-Start Guide
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Silicon Laboratories C8051F41x
• For Use With: 336-1315 - KIT REF DESIGN VOICE RECORD F41X
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1317

Bit7:
Bits6–4: XOSCMD2–0: External Oscillator Mode Bits.
Bit3:
Bits2–0: XFCN2–0: External Oscillator Frequency Control Bits.
Crystal Mode (Circuit from Figure 19.1, Option 1; XOSCMD = 11x)
RC Mode (Circuit from Figure 19.1, Option 2; XOSCMD = 10x)
C Mode (Circuit from Figure 19.1, Option 3; XOSCMD = 10x)
XTLVLD XOSCMD2 XOSCMD1 XOSCMD0 Reserved
Bit7
R
XTLVLD: 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.
RESERVED. Read = 0b; Must write 0b.
000-111: See table below:
Choose XFCN value to match crystal or resonator frequency.
Choose XFCN value to match frequency range:
f = 1.23(10
f = frequency of clock in MHz
C = capacitor value in pF
R = Pullup resistor value in k 
Choose K Factor (KF) for the oscillation frequency desired:
f = KF / (C x V
f = frequency of clock in MHz
C = capacitor value the XTAL2 pin in pF
V
DD
XFCN
SFR Definition 19.3. OSCXCN: External Oscillator Control
R/W
000
001
010
011
100
101
110
Bit6
111
= Power Supply on MCU in volts
3
) / (R x C) , where
Crystal (XOSCMD = 11x)
DD
415 kHz  f  1.1 MHz
1.1 MHz  f  3.1 MHz
3.1 MHz  f  8.2 MHz
155 kHz  f  415 kHz
8.2 MHz  f  25 MHz
R/W
Bit5
58 kHz  f  155 kHz
20 kHz  f  58 kHz
) , where
f  20 kHz
R/W
Bit4
Rev. 1.1
R/W
Bit3
800 kHz  f  1.6 MHz
1.6 MHz  f  3.2 MHz
100 kHz  f  200 kHz
200 kHz  f  400 kHz
400 kHz  f  800 kHz
RC (XOSCMD = 10x)
50 kHz  f  100 kHz
25 kHz  f  50 kHz
XFCN2
f  25 kHz
R/W
Bit2
C8051F410/1/2/3
XFCN1
R/W
Bit1
SFR Address:
C (XOSCMD = 10x)
XFCN0
K Factor = 1590
K Factor = 0.87
K Factor = 180
K Factor = 664
K Factor = 2.6
K Factor = 7.7
K Factor = 22
K Factor = 65
R/W
Bit0
0xB1
00000000
Reset Value
171