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

okanaraz

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

copilot

  1. SGP41_EN - This enable pin does not appear to have an external pull-up or pull-down resistor. Please add one accordingly.
  2. IC3 - This reset pin does not seem to have a pull-down resistor, Consider adding one externally.
  3. 1V8_EN - It appears that this pin does not have either a pull-up or pull-down resistor. Check the datasheet of the component it's connected to and add a resistor as needed.
  4. SCD41_EN - Similarly, this enable pin does not seem to have a pull-up or pull-down resistor. Please add an external pull-up or pull-down resistor.
  5. 3V3_EN - This enable pin does not have a pull-up or pull-down resistor. Please add one as needed.
  6. SHT40_EN - This enable pin seems not to be connected to any resistor. Consider adding an external pull-up or pull-down resistor.
For each enable/reset pin without a pull-up or pull-down resistor, verify the requirements based on the specific IC datasheet. Sometimes internal pull-ups/ pull-downs are provided.
2y
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3
BAT-
SCL
1V8_EN
GND
J4
BAT+
GND
3V3_EN
R5
Resistance
10kΩ
R10
Resistance
Rpg Ω
SHT40_SPLY
C1
Capacitance
100nF
J5
IC1
Not Recommended for New Designs
SGP41_SPLY
Q2
3V3_B
J2
3V3_B
GND
SCL
U3
1V8_EN
GND
SDA
S1
C4
Capacitance
1uF
C6
Capacitance
1uF
SDA
C2
Capacitance
100nF
3V3_USB
GND
R2
Resistance
10kΩ
SDA
3V3_USB
C7
Capacitance
1uF
BAT+
SCL
GND
1V8
SCL
SCD41_EN
C8
Capacitance
1uF
C9
Capacitance
22uF
SGP41_EN
SHT40_EN
3V3_EN
C3
Capacitance
1uF
R9
Resistance
500 Ω
R3
Resistance
4.7 Ω
BAT-
SGP41_EN
SDA
1V8
SCD41_SPLY
3V3_USB
SGP41_SPLY
R8
Resistance
500 Ω
GND
R4
Resistance
1kΩ
3V3_USB
GND
Q1
3V3_USB
SCL
D1
Capacitance
12pF
IC2

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