User's Manual

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4. Detailed Technical Description
4.1 Electronic
4.1.1 BT chip solution to be implemented
The chosen chip to implement BT4.2 compliant connectivity is the Texas Instruments CC2564C
chip.
This is a dual mode (Classic + Low Energy) one chip solution.
This chip comes in several versions:
• Version A (CC2564A) which is on the market already a while, and for which it is
necessary to download a patch to implement mSBC codec.
• Version B (CC2564B) which will be in mass production in Q4/2013. It integrates all
patches for mSBC and other bug corrections in ROM.
• Version C (CC2564C) which is BT4.2 compliant.
This chip integrates the baseband, the RF amplifier, balun, and power regulator.
It needs externally:
• a bandpass filter (SAW filter) + antenna
• an accurate 26MHz source (crystal with less than 20ppm initial+ temperature+aging)
• a standard slow clock at 32.768KHz for low power modes (100ppm), which will be
provided by the CPU
• Some passive components.
We will implement the reference design from Texas Instrument, with minor adaptation to our needs
(no level shifters, or test probe headers…).