SWRU493C July   2024  – January 2025 CC2564C

 

  1.   1
  2.   Trademarks
  3. 1Introduction to the CC256xCQFN-EM Board
    1. 1.1 Key Features
    2. 1.2 QFN EM Board Applications
  4. 2Module Description
  5. 3Module Detailed Description
    1. 3.1 Pin Description
      1. 3.1.1 Board Jumpers
        1. 3.1.1.1 Measuring Current Consumption
      2. 3.1.2 Antenna and U.FL Selector
      3. 3.1.3 RF Connectors
      4. 3.1.4 Debug Header
      5. 3.1.5 COM Connector
    2. 3.2 Clock Inputs
  6. 4Module Dimensions
  7. 5Tools and Software
    1. 5.1 TI's Bluetooth Software Solution
    2. 5.2 Evaluation Platforms
    3. 5.3 Bluetooth Hardware Evaluation Tool
  8. 6Certification
  9. 7Life Support Policy
  10. 8References
  11. 9Revision History

3.1.3 RF Connectors

The RF1 and RF2 connectors can be sued to mount the TI MSP432 platform using the BOOST-CCEMADAPTER board. The RF I/Os are all at 3.3-V levels; this enables seamless integration of the host using TI's platforms that comes preinstalled with EM headers. Table 3-2 and Table 3-3 describe the standard pinout.

Table 3-2 RF1
Pin No. EM Adapter Pin Assignment Pin No. EM Adapter Pin Assignment
1 GND 2 NC
3 MODULE_UART_CTS 4 NC
5 SLOW_CLK 6 NC
7 MODULE_UART_RX 8 NC
9 MODULE_UART_TX 10 NC
11 NC (not connected) 12 NC
13 NC 14 NC
15 NC 16 NC
17 NC 18 NC
19 GND 20 NC
Table 3-3 RF2
Pin No. EM Adapter Pin Assignment Pin No. EM Adapter Pin Assignment
1 NC 2 GND
3 NC 4 NC
5 NC 6 NC
7 3.3V 8 MODULE_AUDIO_DATA_OUT
9 3.3V 10 MODULE_AUDIO_DATA_IN
11 MODULE_AUDIO_FSYNC 12 NC
13 NC 14 NC
15 NC 16 NC
17 MODULE_AUDIO_CLK 18 MODULE_UART_RTS
19 WCS_NSHUTD 20 NC

For complete evaluation of the audio applications while using the RF connectors (a.k.a. EM connectors), the level shifter U4 must be properly configured in order to ensure proper direction of PCM signals.

  • When using CC256XC as PCM master role:
    • R19 must be populated with 10K Ω resistor.
    • R18 and R11 must be unpopulated (removed).
  • When using CC256XC as PCM slave:
    • R18 must be populated with 0Ω resistor.
    • R19 and R11 must be unpopulated (removed).

More information on the hardware changes required for PCM signals on EM connectors can be found in the CC256XCQFN-EM board design files (schematics and bill of materials).

CC256XCQFN-EM PCM Role Selection for RF Connectors Figure 3-2 CC256XCQFN-EM PCM Role Selection for RF Connectors