CC2564MODN Datasheet, PDF (38/62 Pages) Texas Instruments – Bluetooth Host Controller Interface (HCI) Module

CC2564MODN, CC2564MODA
SWRS160D – FEBRUARY 2014 – REVISED DECEMBER 2015
www.ti.com
Figure 6-12. Slow Clock Trace in TI Reference Design
6.2.1.6 Digital Interface Guidelines
6.2.1.6.1 UART
The CC2564MODx UART default baud rate is 115.2 kbps but can run up to 4 Mbps. TI recommends
separating these lines from the DC supply lines, RF lines, and sensitive clock lines and circuitry. To
improve the return path and isolation, run the lines with ground on the adjacent layer when possible.
6.2.1.6.2 PCM
The digital audio lines (pulse-code modulation [PCM]) are high-speed digital lines in which the four wires
(AUD_CLK, AUD_FSYNC, AUD_IN, and AUD_OUT) must be roughly the same length. TI recommends
running these lines as a bus interface (see Figure 6-13). These lines are high-speed digital and must be
separated from DC supply lines, RF lines, and sensitive clock lines and circuitry. Run the lines with ground
on the adjacent layer to improve the return path and isolation.
Figure 6-13. Running the Digital Audio Lines
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Applications, Implementation, and Layout
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