STM8T143 datasheet(31/65 Pages) STMICROELECTRONICS

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STM8T143

Device operation

6.2.3

Data streaming mode

The STM8T143 can stream data to allow designers fine tune the application and device

settings. Data streaming may also be used by an MCU to control events or to further

process the results obtained from STM8T143 devices. Data streaming is performed using a

1-wire communication data protocol on the data streaming output pin. When Data streaming

mode is enabled, the OUT function is no longer accessible.

Data streaming protocol

The data streaming output is open drain. Figure 16 illustrates the communication protocol

for initializing and sending data using a 1-wire communication protocol.

Communications is initiated by a START bit.

Following the START bit, a synchronization byte (0xAA) is sent. This byte can be used

by the MCU for clock synchronization.

Following the synchronization byte, the data bytes are sent with the MSB first.

Each byte sent is preceded by a START bit; a STOP bit follows every byte.

The STOP bit does not have a defined period.

Figure 16. Data streaming frame

Data streaming is initiated by the STM8T143. When data streaming is enabled, a frame is

sent after each charge cycle. Therefore, the acquisition is not disturbed by the

communication itself.

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