Problems with Slave Select Control on dsPIC33/PIC24 Family

The SSxOUT does not function as a "SPIx Slave Select Output" and is always in a low state. Why is this?

Slave select signals are not automatically generated. When using the Slave Select mode, the SSx pin, or another GPIO pin, must be used to control the slave's SSx input. This slave select pin is controlled by your application.

There must be a separate control signal for each slave on an SPI bus.

For more information, please refer to the "Master Mode Operation" section of the SPI Peripheral Chapter in the dsPIC33/PIC24 Family Reference Manual.

© 2018 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.