Texas Instruments CC2564MODNEM, User Manual, Page: 13 / 23

RF Interface
(Default)
Antenna
RF Interface
U.FL
CC2564MODN
Figure 8-3. Jumper Configuration
8.3.3 Slow Clock
8.3.3.1 Clock Inputs
The slow clock can come from an internal or external source. The CC2564MODNEM lets you place the slow
clock on the board (the default setting) or source it from an external source. The CC2564MODN connects to the
SLOW_CLK_IN and can be a digital signal in the range of 0 V to 1.8 V. The frequency accuracy of the slow clock
must be 32.768 kHz + –250 ppm for
Bluetooth use (according to the Bluetooth specification).
CC2564MODN
Oscillator
Slow Clock
(Default)
SLOW_CLK_IN
Slow Clock
Slow Clock
Slow Clock
EM
Connector
32.768-KHz
Level
Shifters
COM
Connector
Figure 8-4. Clock Input
www.ti.com Hardware Description
SWRU390A – AUGUST 2014 – REVISED AUGUST 2021
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Dual-Mode Bluetooth ® CC2564 Module Evaluation Board 13
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