AnsweredAssumed Answered

s9keaz128a MLH reset pin problem,MCU can not boot properly

Question asked by Lynger Zhu on Oct 30, 2018
Latest reply on Nov 5, 2018 by Robin_Shen

Hi all,

I'm using s9keaz128a MLH 2N45K CTHE 1811G for a automotive project as a motor controller. However the board doesnot running properly as expected. It could not boot. The 5V VCC is OK with no noise, But the #s9keaz128a Reset pin (without capacitor) is poor like this:

s9keaz128aMLH  reset pin without capacitor

and with capacitor ( 2.3V plus Sawtooth Wave noise):

s9keaz128aMLH  reset pin with capacitor

 

 

the reset pin(pa5/reset_b 63 pin) circuit:

the reset should be 5V. 

Outcomes