ESP32C3F4H abnormal deep_sleep current leakage (reason : VDD_SPI must NOT be connected to the 3v3 rail)

[0x0fe]

Board

ESP32-C3 custom board

Device Description

custom board with ESP32C3F4H and ultra lo Iq LDO (500nA).

Hardware Configuration

external chips / peripherals have been remove or disconnected for the test,
some pullups are left :
0 ,1 ,2, 8 : 10K
10 : 100K

Version

v2.0.4

IDE Name

arduino IDE

Operating System

windows 10

Flash frequency

80M

PSRAM enabled

no

Upload speed

921600 (not relevant for CDC)

Description

The curent drawn in deep sleep is 2500uA, while it should be 5uA, obviously there is a leak somehwere, i suspect the GPIOs are not going into high impedance when i set them to ANALOG, or something else is wrong. I use the RTC timer deep sleep mode and disable other sources of wakeup.
If i use gpio_reset_pin then it cannot enters deep sleep at all. Since everything else is removed from the board i am now sure it comes from the ESP32C3, besides, the quiescent current has been tested valid when the ESP32C3 is removed (under 0.5uA).

Sketch

void gpios_hiz(void){
  
  pinMode(0, ANALOG);
  pinMode(1, ANALOG);
  pinMode(2, ANALOG);
  pinMode(3, ANALOG);
  pinMode(4, ANALOG);
  pinMode(5, ANALOG);
  pinMode(6, ANALOG);
  pinMode(7, ANALOG);
  pinMode(8, ANALOG);
  pinMode(9, ANALOG); is removed
  pinMode(10, ANALOG);
  
  pinMode(11, ANALOG); 
//  pinMode(12, ANALOG);
//  pinMode(13, ANALOG);
//  pinMode(14, ANALOG);
//  pinMode(15, ANALOG);
//  pinMode(16, ANALOG);
//  pinMode(17, ANALOG);
 
  pinMode(18, ANALOG);
  pinMode(19, ANALOG);
  pinMode(20, ANALOG);
  pinMode(21, ANALOG);

// this does not work and prevents entering deep sleep
//  for(int i = 0; i < SOC_GPIO_PIN_COUNT; ++i) {
//    if(GPIO_IS_VALID_GPIO(i) && !GPIO_IS_INTERNAL_FLASH_PIN(i)) {
//      gpio_reset_pin((gpio_num_t)i);
//    }
//  }
}
void deep_sleep_enter(void){
   
  esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_ALL);
  esp_sleep_config_gpio_isolate();
  esp_deep_sleep(15*1000000);
}
void setup(){

  Serial.begin(115200);
  //while(!Serial)delay(1);
  printf("System ready");
  delay(8000);
  gpios_hiz();  
  deep_sleep_enter();  
}
void loop(){

}

Debug Message

none

Other Steps to Reproduce

none

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[0x0fe]

i disconnected 3 pullups and it is now down to 1975uA, this confirms the GPIOs are not really in high impedance state.

[0x0fe]

nb: no rtc crystal is installed, since GPIO 0 and 1 are used

[hdpklm]

some pullups are left : 0 ,1 ,2, 8 : 10K 10 : 100K

3.3V / 10K are 0.00033A or 0.33mA
0.33mA * 4 are about 1.32mA
so when you are remove ESP32, the internal inpedance or maybe its mode output. I not sure but the current is so similar 🤷‍♀️

[hdpklm]

I have one question: arduino IDE can compile single-core ESP32-C3 ???
I know the arduino-esp32 only work with dual-core, any news ?

[0x0fe]

not sure which "internal impedance" (of what?) you are talking about. Besides, adding the pullup resistors current is not going to give you the total current, it is much more complex than that, some of these pullups are connected to MOS, there is internal pull-up/down and there is various internal peripherals which may be prevented to sleep if configuration is not correct, etc. There is also some relations between gpios outside the chip itself, which can complicate things. Bottom line is, the GPIOs are not in high impedance mode yet, otherwise external pullups would have no influence, which is the problem.

[0x0fe]

I have one question: arduino IDE can compile single-core ESP32-C3 ??? I know the arduino-esp32 only work with dual-core, any news ?

it is not appropriate to ask a totally unrelated question into someone else issue, you have forums for that, besides, ESP32C3 is a single core, so not sure what you are talking about.

[0x0fe]

just tested on another design which has most GPIOs floating (connected to a header which is disconnected), only the two pullups for bootstrap, and i get the same result, 3500uA

[hdpklm]

Hello @0x0fe
in my custom design change the pullup resistors from 10K to 100K and the battery life improves.
I don't know about your case, but I still have the problem of inappropriate consumption, which is not mentioned in the datasheet.
the truth is that I don't know where it comes from

[0x0fe]

yeah i think you dont have much clue, and thus not much business replying in such technical issue.
if your GPIOs are high impedance then the value of external pullups has zero incidence, that is quite basic concept to understand.

If you had to change your external pullups to reduce the current then it means you did not set the GPIOs to high impedance state.

[lbernstone]

Are you able to get to the power level you are looking for if you use esp_sleep_pd_config to turn off all the power domains?

[0x0fe]

Are you able to get to the power level you are looking for if you use esp_sleep_pd_config to turn off all the power domains?

i haven't tried to use the sleep pd config to manually turn everything off, good idea let me try this

[0x0fe]

well, adding these actually increased the current to 3750uA

// disable all RTC features except the timer
esp_sleep_pd_config(ESP_PD_DOMAIN_MAX, ESP_PD_OPTION_OFF);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_SLOW_MEM, ESP_PD_OPTION_OFF);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_FAST_MEM, ESP_PD_OPTION_OFF);