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U3
U2
Check that all reset/enable have an external pull-up or pull-down resistors. Rep...
ofacatramontina

ofacatramontina

@copilot Check that all reset/enable have an external pull-up or pull-down resistors. Report action items in an ordered list.
2y

copilot

Based on the project description and datasheet excerpts, here are the pins that may require external pull-up or pull-down resistors:
  1. From the TB6612FNG's datasheet excerpt, it states that there are internal pull-down resistors for STBY (Standby), and ch A and ch B inputs (AIN1, AIN2, BIN1, BIN2)[1]. You may need external pull-ups or pull-downs depending on your specific application. TB6612FNG's STBY is connected to ESP32's 3V3 net, which seems to be always high. This means the motor driver is not placed into standby mode so you might not need additional resistors here, but please verify this based on your specific requirements.
  2. ESP32-DEVKITC's EN (Enable) pin doesn't seem to have any external pull-up or pull-down resistors. The datasheet excerpt doesn't provide additional information on whether it has internal resistors[2]. Verify whether or not you need to add an external pull-up resistor to this pin.
  3. ESP32-DEVKITC's GPIO16 is used for PSRAM's CE# signal as mentioned in the datasheet and it is recommended to add a pull-up resistor if used[2]. In your circuit, it seems GPIO16 is not used which means this is not an action item.
So, putting these together, here are your action items:
  1. Check if the STBY pin of U3 (TB6612FNG) requires an external pull-up or pull-down resistor based on your application, adjust as necessary.
  2. Verify whether the EN pin of ESP1 (ESP32-DEVKITC) requires an external pull-up resistor, if it does, add one.
[1] Page 2
[2] Page 23
2y
2
BIN2
PWM A
12 V 3S Li-po
BIN 1
5V vcc
AIN 2
PWM B
AIN 1
BIN2
PWM B
3V3
AIN 1
AIN 2
3V3
BIN 1
PWM A
D1
R1
Resistance
600 Ω
SW1
J1
ESP1

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