C8051F360DK Silicon Laboratories Inc, C8051F360DK Datasheet - Page 172

• Manufacturer Part Number: C8051F360DK
• Description: KIT DEV FOR C8051F360 FAMILY
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F360DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F36x
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: C8051F360, F361, F362, F363, F364, F365, F366, F367, F368, F369
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1410

C8051F360/1/2/3/4/5/6/7/8/9
16.2.1. Calibrating the Internal L-F Oscillator
Timers 2 and 3 include capture functions that can be used to capture the oscillator frequency, when run-
ning from a known time base. When either Timer 2 or Timer 3 is configured for L-F Oscillator Capture
Mode, a falling edge (Timer 2) or rising edge (Timer 3) of the low-frequency oscillator’s output will cause a
capture event on the corresponding timer. As a capture event occurs, the current timer value
(TMRnH:TMRnL) is copied into the timer reload registers (TMRnRLH:TMRnRLL). By recording the differ-
ence between two successive timer capture values, the low-frequency oscillator’s period can be calcu-
lated. The OSCLF bits can then be adjusted to produce the desired oscillator frequency.
Table 16.2. Internal Low Frequency Oscillator Electrical Characteristics
–40°C to +85°C unless otherwise specified.
172
Oscillator Frequency
Oscillator Supply Current (from V
Power Supply Sensitivity
Temperature Sensitivity
Bit 7:
Bit 6:
Bits 5–2: OSCLF[3:0]: Internal L-F Oscillator Frequency Control bits.
Bits 1–0: OSCLD[1:0]: Internal L-F Oscillator Divider Select.
SFR Page:
SFR Address:
OSCLEN OSCLRDY OSCLF3
R/W
Bit7
OSCLEN: Internal L-F Oscillator Enable.
0: Internal L-F Oscillator Disabled.
1: Internal L-F Oscillator Enabled.
OSCLRDY: Internal L-F Oscillator Ready.
0: Internal L-F Oscillator frequency not stabilized.
1: Internal L-F Oscillator frequency stabilized.
Fine-tune control bits for the Internal L-F oscillator frequency. When set to 0000b, the L-F
oscillator operates at its fastest setting. When set to 1111b, the L-F oscillator operates at its
slowest setting.
00: Divide by 8 selected.
01: Divide by 4 selected.
10: Divide by 2 selected.
11: Divide by 1 selected.
Parameter
F
0xAD
SFR Definition 16.3. OSCLCN: Internal L-F Oscillator Control
Bit6
R
R/W
Bit5
DD
)
OSCLF2
OSCLD = 11b
25 °C, V
OSCLCN.7 = 1
Constant Temperature
Constant Supply
R/W
Bit4
Conditions
DD
OSCLF1
Rev. 1.0
= 3.0 V,
R/W
Bit3
OSCLF0
R/W
Bit2
Min
72
—
—
—
OSCLD1 OSCLD0
R/W
Bit1
Typ
5.5
2.4
80
30
R/W
Bit0
Max
88
10
—
—
Reset Value
00vvvv00
ppm/°C
Units
kHz
%/V
µA