User's Manual

Bluetooth Low Energy Module
Shanghai Ehong Technologies Co., Ltd
6.5. UART
This is a standard UART interface for communicating with other serial devices. The
UART interface provides a simple mechanism for communicating with other serial
devices using the RS232 protocol.
Table 8: Possible UART Settings
Figure 3： Connection To Host device
6.6. I2C Master
The module can act as an I2C master when configured by software. Any two PIOs can
be configured as I2C_SCL and I2C_SDA.
6.7. SPI Master
The module can act as an SPI master (mode 0) when configured by software. Any four
PIOs can be configured as SPI_CLK, SPI_CS#, SPI_DIN and SPI_DOUT. The clock
rate of the software SPI is around 470kHz.
Parameter
Possible Values
Baud Rate Minimum
1200 baud (≤2%Error)
9600 baud (≤1%Error)
Maximum
2M baud (≤1%Error)
Flow Control
RTS/CTS or None
Parity
None, Odd or Even
Number of Stop Bits
1 or 2
Bits per Byte 8