SWRA834 May   2025 CC2340R5 , CC2340R5-Q1 , CC2744R7-Q1 , CC2745P10-Q1 , CC2745R10-Q1 , CC2745R7-Q1 , CC2755R10

1.   1
2.   Abstract
3.   Trademarks
4. 1 Introduction
5. 2 Reference Designs
   1. 2.1 LP-EM-CC2340R53
   2. 2.2 LP-EM-CC2340R5
   3. 2.3 LP-EM-CC2340R5-Q1
   4. 2.4 LP-EM-CC2340R5-RGE-4x4-IS24
   5. 2.5 LP-EM-CC2745R10-Q1
6. 3 Schematic
   1. 3.1 Schematic Overview
      1. 3.1.1 48MHz Crystal
      2. 3.1.2 32.768kHz Crystal
      3. 3.1.3 Filter
      4. 3.1.4 Decoupling Capacitors
      5. 3.1.5 Antenna Components
      6. 3.1.6 RF Shield
   2. 3.2 I/O Pins Drive Strength
   3. 3.3 Bootloader Pins
   4. 3.4 Serial Wire Debug (SWD) Pins
7. 4 PCB Layout
   1. 4.1 Board Stack-Up
   2. 4.2 LC Filter
   3. 4.3 Decoupling Capacitors
   4. 4.4 Placement of Crystal Load Capacitors
   5. 4.5 Current Return Path
   6. 4.6 DC/DC Regulator
   7. 4.7 Antenna Matching Components
   8. 4.8 Transmission Lines
   9. 4.9 Electromagnetic Simulation
8. 5 Antenna
9. 6 Crystal Tuning
   1. 6.1 CC23xx and CC27xx Crystal Oscillators
   2. 6.2 Crystal Selection
   3. 6.3 Tuning the LF Crystal Oscillator
   4. 6.4 Tuning the HF Crystal Oscillator
10. 7 Optimum Load Impedance
11. 8 PA Table
12. 9 Power Supply Configuration
    1. 9.1 Introduction to Power Supply
    2. 9.2 DC/DC Converter Mode
    3. 9.3 Global LDO Mode
13. 10Board Bring-Up
    1. 10.1 Power On
    2. 10.2 RF Test: SmartRF Studio
    3. 10.3 RF Test: Conducted Measurements
       1. 10.3.1 Sensitivity
       2. 10.3.2 Output Power
    4. 10.4 Hardware Troubleshooting
       1. 10.4.1 No Link: RF Settings
       2. 10.4.2 No Link: Frequency Offset
       3. 10.4.3 Poor Link: Antenna
       4. 10.4.4 Bluetooth Low Energy: Device Does Advertising But Cannot Connect
       5. 10.4.5 Poor Sensitivity: Background Noise
       6. 10.4.6 High Sleep Power Consumption
14. 11Summary
15. 12References