Hi Sir,
We are using the DA14531 MOD in my design. As per the datasheet P0.0 (J12) is the RESET Pin and Logic high on the P0.0 pin make the module Reset.
We are using a transistor circuit to reset the module, The input of the transistor circuit from microcontroller.
"But the module only working ( Program) when the R304 is removed state"
We cross checked the base voltage of transistor is 0.7V and at the time collector voltage is upto 120mV.
We also check with by changing the R304 resistor values low(4.7K) and high(20K).
Could you please suggest what will be issue? what modifications we needs to make
Hi CHIN,Thank you for posting your question online.When you have removed the R304 everything works as expected? On the DA14531MOD, the P0_0 is the HW reset but it is also being used by the integrated SPI Flash. For this reason you can not have the P0_0 directly connected to GND. A simple Button/Switch implementation should be enough to handle the HW Reset.Best Regards,OV_Renesas
The module is working fine when the R304 removed.
We want control the reset from the microcontroller.
what is the external pull down resistor required for the Reset pin pull down
also if you can share the reference reset pin control circuit will helps us
Hi CHIN,Thank you for the reply and apologies for the delay.Please refer on AN-B-075: DA14530/531 Hardware Guidelines (renesas.com), section 3.2.4 Reset ,page: 25and also section Appendix A Special considerations for Reset Functionality on page: 40.I think that will cover your needs!Best Regards,OV_Renesas