CMS32L051 User Manual |Chapter 12 Universal Serial Communication Unit
www.mcu.com.cn 381 / 703
By using the slave select input function, one master device can be connected to multiple slave devices for
communication. The master device outputs a slave selection signal to the slave device (1) of the communication
object, and each slave device determines whether it is selected as a communication object and controls the
output of the SDO pin. When selected as a slave device for communication object, the SDO pin can
communicate with the master device to send data; When a slave device is not selected as a communication
object, the SDO pin becomes a high-level output, so in the environment where multiple slaves are connected,
the SDO pin needs to be set to Nch-O.D and the node pulled up. In addition, even the serial clock of the input
master device is not transmitted and received.
Note The slave select signal must be output through the operation of the port.
Figure 12-70 Structural example of the Slave select input function
To Next Page
Loading...