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 19, 2018 by Lynger Zhu

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.