Pull-up and pull-down resistors in schematic in PCB Design - Dashboard Guide

Dashboard Mode - Pull-up and pull-down resistors in schematic

Goal

Understand how pull-up and pull-down resistors affect input signal states in a digital circuit schematic.

Sample Data

Input Pin	Resistor Type	Resistor Value (kΩ)	Input State (No External Signal)	Input State (External Signal = LOW)	Input State (External Signal = HIGH)
Pin A	Pull-up	10	HIGH	LOW	HIGH
Pin B	Pull-down	10	LOW	LOW	HIGH
Pin C	Pull-up	4.7	HIGH	LOW	HIGH
Pin D	Pull-down	4.7	LOW	LOW	HIGH
Pin E	None	0	FLOATING	LOW	HIGH

Dashboard Components

• KPI Card: Count of Pins with Pull-up Resistors = 2 (Pins A, C)
• KPI Card: Count of Pins with Pull-down Resistors = 2 (Pins B, D)
• Bar Chart: Number of Pins by Input State when No External Signal
  Data: HIGH=2, LOW=2, FLOATING=1
• Table: Detailed Pin States and Resistor Info (from sample data)

Dashboard Layout

+----------------+----------------+------------------+
|  KPI: Pull-up  |  KPI: Pull-down|                  |
|  Resistors: 2  |  Resistors: 2  |  Bar Chart       |
|                |                |  Input States     |
+----------------+----------------+------------------+
|                  Detailed Pin States Table             |
+-------------------------------------------------------+

Interactivity

User can filter by Resistor Type (Pull-up, Pull-down, None). Filtering updates:

• KPI cards update counts accordingly.
• Bar chart updates to show input states only for selected resistor type.
• Table filters rows to show only pins with selected resistor type.

Self Check

If you add a filter for Resistor Type = Pull-up, which components update and how?

• KPI cards: Pull-up count shows 2, Pull-down count shows 0.
• Bar chart: Shows input states only for Pins A and C.
• Table: Displays only rows for Pins A and C.

Key Result

Dashboard shows how pull-up and pull-down resistors set default input states on pins in a digital circuit.