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Bluetooth Module Series
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3.5. RESET
It supports hardware reset. The reset sequence is shown in the figure below, the T
rst
> 50 ms.
Figure 3: Power on Reset Timing
3.6. I2C Interface
The I2C interface is a master or slave interface. It supports 100 kHz, 400 kHz and 800 kHz clock rates
for controlling EEPROM etc. The I2C interface provides several data formats and can fit various I2C
peripherals. Sequential reading and writing are supported to improve throughputs. The I2C support DMA
operation for extra MCU free data transfer. The I2C work as either master or slave, but cannot change
the working mode after configuration.
3.7. SPI
The Serial Peripheral Interface (SPI) bus is a synchronous serial communication interface specification
used for short distance communication, primarily in embedded systems. The HC06U integrates 2 SPIs,
they can work in either master or slave mode and support DMA or software mode to transfer data.
The master or slave controller only supports point-to-point connection by hardware. Both the SPI has
only one CS pin. The connection is shown below.
Figure 4: SPI Connection