Please answer below.
The same question is written in English and Japanese.
・English
Overshoot/undershoot occurs in SPI (Master) MOSI, CS and CLK.
Is it possible to change the Slew rate to Slow? Is it fast fixed?
・Japanese
SPI(Master)のMOSI,CS,CLKで、オーバーシュート・アンダーシュートが発生します。
Slew rateをSlowを変更可能でしょうか？Fast固定でしょうか？
Regards
Hello
It is possible to change the slew rate to slow by making changes in the GPIO_PRTx_PC[25] register bit.
Refer to the page 769 of the register TRM for PSoC 4100 S Plus: https://www.cypress.com/file/405866/download .
I tried to recreate the project and was able to reproduce the issue.
With slew rate set to default (i.e fast) undershoot/ overshoot was observed.
with slew rate set as slow, the output was as shown below:
I have attached the project for reference. Please ensure that the rise time and fall time meet the required specification of the SPI when using slow slew rate.
Regards
Ekta
Hello
It is possible to change the slew rate to slow by making changes in the GPIO_PRTx_PC[25] register bit.
Refer to the page 769 of the register TRM for PSoC 4100 S Plus: https://www.cypress.com/file/405866/download .
I tried to recreate the project and was able to reproduce the issue.
With slew rate set to default (i.e fast) undershoot/ overshoot was observed.
with slew rate set as slow, the output was as shown below:
I have attached the project for reference. Please ensure that the rise time and fall time meet the required specification of the SPI when using slow slew rate.
Regards
Ekta
Ekta-san
I have additional questions.
・English
The waveform appears to be a signal that switches faster than 1 MHz.
Is it OK to set Slew rate to Slow?
・Japanese
頂いた波形は1MHzより早く切り替わる信号に見えます。
Slew rateをSlowに設定して問題ないのでしょうか？
Regards
