Bluetooth Audio Module
Ehong Technology Co., Ltd
The UART CTS and RTS signals can be used to implement RS232 hardware flow control where
both are active low indicators.
Table 10: Possible UART Settings
Figure 3
：
Connection To Host device
6.7. I2C Master
PIO6, PIO7 and PIO8 can be used to form a master I
2
C interface. The interface is formed using
software to drive these lines. It is suited only to relatively slow functions such as driving a LCD,
keyboard scanner or EEPROM. In the case, PIO lines need to be pulled up through 2.2K
Ω
resistors.
Parameter
Possible Values
Baud Rate
Minimum
1200 baud (≤2%Error)
9600 baud (≤1%Error)
Maximum
3M 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
