Data Sheet
Table Of Contents
- 1. Feature List
- 2. Typical Applications
- 3. Design Guidelines
- 4. Pin-Out Description
- 5. Power Control
- 6. Interface
- 7. Antenna
- 8. Bluetooth® Software Stack
- 9. Host Interface
- 10. Connection Examples
- 11. Electrical Characteristics
- 12. RF Characteristics
- 13. Packaging Specifications
- 14. Soldering Recommendations
- 15. Tape and Reel Packaging
- 16. Certifications
- 17. Ordering Guide
- 18. Revision History
9. Host Interface
9.1 UART
For applications where an external host (such as an MCU) is used, BT122 can be controlled over the UART interface using the BGA-
PI
â„¢
serial protocol.
For stable UART communication, it is recommended to use hardware flow control (RTS/CTS pin). It is also recommended that the ac-
curacy of the clock of the controlling host should be 1% or better for the UART signaling to work reliably with speeds exceeding 115200
kbps (maximum baud rate is 3 Mbps).
Default UART settings are listed in the table below.
Table 9.1. BT122 UART Interface Default Settings
Parameter Default setting
UART baud rate 115200
RTS/CTS flow control Enabled
Data bits 8
Parity None
Stop bits 1
BT122 Data Sheet
Host Interface
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