Hi There,
I just finished fixing the issue of DCDC can't enable two weeks ago, and now I have a new issue that is LED_LOW can't disable(see below).
The program will be crash when the program runs here. By the way, the circuit board was designed by myself and I use the BUCK mode. I checked my circuit board, and I found that the output voltage of pin 5 and pin 6 of the chip is 1.18V. Meanwhile, I have checked the document of DA14531, and I haven't found any indication that 1.18V is correct. I attach my schematic of the circuit(see below).
If the program runs nomally, what is the external output voltage of pin 5 and pin 6? If there is no problem with 1.18V, then what could be the cause?
Thanks for your assist.
BR,
NX
Hi NX,
You can refer to this EVB schematic: DA14531 QFN24 Pro Development Kit Daughter Board Schematic
and this HW design guide:AN-B-075: DA14530/531 Hardware Guidelines
Are you using the battery for power supply? if not you do not need a inductance, you can use bypass mode with VBT_HIGH and VBT_LOW both connected to 3v3.
About the GPIO voltage, it's follows with VBAT_HIGH
JH_Renesas
Hi JH,
Thanks for your answer. As you guessed, I use the battery for power supply. According to the infor you provided, I found that the C2 I used was differ. I measured the value of C2, and it's more than 1uF actually. And the value of C2 is somewhere between 1.1~1.2uF. Let me try to change the value of C2 to 2.2uF.
Thanks for your assist again.
I changed the value of C2 to 2.2uF and 10uF, the program still crash when the program runs here. I use the 2.2uF rated voltage is 10V, the 10uF rated voltage is 6.3V. Also the L1 inductance is DFE201210U-2R2M=P2．
The rated voltage of 2.2uF capacitor recommended in the document is 25V. I would like to ask whether this rated voltage must meet this standard? Another question is whether the problem is related to the crystal oscillator used? The crystal oscillator I used is in accordance with the requirements of the document.
Are you debugging in the sleep mode? Could you try again with sleep mode off
Ｈｉ Ｔｈｅｒｅ，
Ｔｈａｎｋｓ ｆｏｒ ｙｏｕｒ ａｎｓｗｅｒ．Ｔｈｉｓ ｉｓ ｔｈｅ ｐａｔｔｅｒｎ Ｉ ｕｓｅ．
ＢＲ，
ＮＸ
Ｔｈｅ ｏｕｔｐｕｔ ｖｏｌｔａｇｅ ｏｆ ｐｉｎ ５ ａｎｄ ｐｉｎ ６ ｏｆ ｔｈｅ ｃｈｉｐ ｉｓ １．１８Ｖ． Ｉｔ＇ｓ ｍｏｒｅ ｔｈａｎ ｔｈｅ ｖａｌｕｅ ｏｎ ｔｈｅ ｐｉｃｔｕｒｅ．I ｗａｎｔ ｔｏ ｍａｋｅ ｓｕｒｅ ｔｈｉｓ ｉｓ ａ ｎｅｃｅｓｓａｒｙ ｃｏｎｄｉｔｉｏｎ？
Ｔｈａｎｋｓ ｆｏｒ ｙｏｕｒ ａｓｓｉｓｔ．
It's LDO_LOW, not for GPIO:
Ｌｅｔ ｍｅ ｃｌａｒｉｆｙ ｍｙ ｍｅｓｓａｇｅ．
Ｉ ｕｓｅ ｔｈｅ ＢＵＣＫ ｍｏｄｅ， ａｎｄ ｔｈｅ ｐｉｎ ５ ｉｓ Ｖｂａｔ＿ｌｏｗ ｔｈｅ ｐｉｎ ６ ｉｓＬＸ．
Ｎｏｗ， ｔｈｉｓ １．１８Ｖ ｉｓ ｍｏｒｅ ｔｈａｎ ｔｈｅ ｍａｘｉｎｕｍ ａｃｔｕａｌｌｙ．
Can you run any example projects as expected? like prox_reporter ?
What is your power supply voltage?
Thanks for you answer. I've tried, and the result is the same.
When the program runs here, the program will be crash. For supply voltage, I tried using 3V and 3.3V. But, the result is the same.