Hello,
I am working on verifying a design that uses UART and SPI interfaces. To complete this verification, I was hoping to find information on the required signal characteristics to properly interface with the DA14580, but did not see it in the datasheet or app notes. Our devices are working fine, but I want to be sure we are not close to the edge of acceptable limits. So, can anyone provide any of the following information:
1. Setup and Hold time required on the SPI interface
2.Maximum Rise and Fall times on the UART interface
3. UART clock timing precision, including absolute accuracy and allowable jitter.
Thanks very much in advance!
Device:
Hi hughesk,
1. The setup time in the worst case scenario when the SPI works with 8MHz is about aproximatelly 52.5ns (in essence is the semiperiod of your spi clock - 10ns) there is no hold time since your data can only change with your clock.
2.UART依赖的最大上升和下降时间on your pcb, how much current you can drive and sink.
3. About the UART timing percision please check the attachment below.
Thanks MT_dialog