About JieHong Mai

JieHong Mai · 2020-04-08

The SMPS output voltage can reach 1.8V . That is upper than 1.7V requested.

JieHong Mai · 2019-06-15

JieHong Mai · 2019-06-15

I want the ADC of the MCU be more accurate.I know the PLL belong to the power field of the VDDA .Thanks.

JieHong Mai · 2017-10-23

Posted on October 24, 2017 at 06:21When I meet a bad block in a NAND flash,it will stop here forever.The 'tickstart = HAL_GetTick()' should put in front of 'while(HAL_NAND_Read_Status(hnand) != NAND_READY)'.#nand-flash-driver #stm32cubemx #bug

JieHong Mai · 2020-04-29

I know that.Because the volatage for the core actual needed is 1.38V. The internal SMPS output voltage is too big. It will make IC more heater. As to,why internal LDO can run at 480Mhz, in my opinion, it is that the LDO area of the chip can...

JieHong Mai · 2019-06-27

I tested the resistance between VssA and Vss of STM32F405RGT using multimeter, I found it was 8 ohms.

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Why STM32H745xxx can't run at 480Mhz when the core is supplied by internal SMPS directly?

for STM32F405RGT, is the VSSA and VSS connected internally on the chip? Should I need to connected them externally ?

for STM32F405RGT, for the ground pin of HSE crystal oscillator 's load capacitor ,should it connect to the AGND or DGND？ Because I use the ADC of the MCU，so i seperate the AGND(vssa) and DGND(vss).

I found a Bug about the NAND Flash Driver of STM32F7

Re: Why STM32H745xxx can't run at 480Mhz when the core is supplied by internal SMPS directly?

Re: for STM32F405RGT, is the VSSA and VSS connected internally on the chip? Should I need to connected them externally ?