CC2564C Datasheet, PDF (24/52 Pages) Texas Instruments – CC2564C Dual-Mode Bluetooth Controller

CC2564C
SWRS199A – APRIL 2016 – REVISED NOVEMBER 2016
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6.3.2.1 External F_REF DC-Coupled
Figure 6-2 and Figure 6-3 show the clock configuration when using a square wave, DC-coupled external
source for the fast-clock input.
NOTE
A shunt capacitor with a range of 10 nF must be added on the oscillator output to reject high
harmonics and shape the signal to be close to a sinusoidal waveform.
TI recommends using only a dedicated LDO to feed the oscillator. Do not use the same VIO
for the oscillator and the CC2564C device.
FREFP
CC2564C
FREFM
Copyright © 2016, Texas Instruments Incorporated
Figure 6-2. Clock Configuration (Square Wave, DC-Coupled)
V_Fref [V]
2.1
V_{high_min}
1.0
0.37
V_{low_max}
–0.2
t
clksqtd_wrs064
Figure 6-3. External Fast Clock (Square Wave, DC-Coupled)
Figure 6-4 and Figure 6-5 show the clock configuration when using a sine wave, DC-coupled external
source for the fast clock input.
FREFP
CC2564C
FREFM
VDD_IO
Copyright © 2016, Texas Instruments Incorporated
Figure 6-4. Clock Configuration (Sine Wave, DC-Coupled)
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Detailed Description
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Copyright © 2016, Texas Instruments Incorporated