Control PCB Design for Medical Sterilizer

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COMMS Interfaces Summary

Table

Interface	Component(s) & Ref.	Connections & Support
HMI UART1 Header	J6; Bulk cap C21	Pin_1=+5V→+5V, Pin_2=GND→GND; Pin_3=TX→U3:PD3; Pin_4=RX→U3:PD2; bulk 1000 µF
Printer UART2 Header	J7	Pin_1=+5V→+5V; Pin_2=GND→GND; Pin_3=TX→U3:PH1; Pin_4=RX→U3:PH0
Micro SD Socket & Protection	J8; ESD D1; series resistors R13, R14, R15, R16	U3:MOSI→R13→ESD→J8:DI; U3:MISO→R14→ESD→J8:DO; U3:SCK→R15→ESD→J8:SCK; U3:SS→R16→ESD→J8:CS
DS3231 RTC w/ VBAT	U4; bypass C22; VBAT holder J9	+5V→U4:VCC via C22; GND→U4:GND; SDA→I2C SDA net; SCL→I2C SCL net; VBAT→J9

Success Criteria Review

✅ All COMMS headers, SD socket, ESD, DNP resistors, bulk cap, bypass cap, and RTC components are placed.
✅ Correct pin mappings to U3 (PD3/PD2, PH1/PH0, MOSI/MISO/SCK/SS) verified.
✅ I2C pull-ups (R11/R12) remain active on SDA/SCL nets.
✅ COMMS_Pinouts property reflects all interfaces and reference designators.

Next Step With the COMMS sheet complete, shall I prepare the board for PCB layout?

137 days

Plan completed.

Show Plan

C15

Capacitance

U3 VCC - C1 P1

U4 VCC - C22 P1

D1 2 - GND GND

Resistance

500 Ω

Capacitance

R4 P1 - R8 P1

J24V_IN 1 - D1 1

D1 2 - GND GND

C13

Capacitance

J4 Pin_2 - U3 PH0

D1 2 - GND GND

R5 P1 - C18 P2

R13 P2 - J8 DI

J4 Pin_1 - U3 PH1

J24V_IN

U2 OUT - C6 P1

R3 P1 - R7 P1

J3 Pin_2 - U3 PD2

SW1

D1 2 - GND GND

C20

Capacitance

U3 VCC - C1 P1

R6 P1 - C19 P2

U4 VBAT - J9 POS

U3 XTAL1 - C7 P1

Capacitance

Resistance

500 Ω

U3 AVCC - L1 P2

Resistance

500 Ω

R6 P1 - C19 P2

R13 P2 - J8 DI

C19

Capacitance

C18

Capacitance

D1 2 - GND GND

J3 Pin_2 - U3 PD2

Resistance

500 Ω

U3 VCC - C1 P1

U3 ~RESET - SW1 P1

C22

Capacitance

GND

D1 2 - GND GND

Inductance

R3 P1 - R7 P1

D1 2 - GND GND

R4 P1 - R8 P1

C11

Capacitance

R14

Resistance

500 Ω

Resistance

500 Ω

R15 P2 - J8 SCK

U3 XTAL1 - C7 P1

J3 Pin_1 - U3 PD3

J4 Pin_2 - U3 PH0

R13 P2 - J8 DI

U3 VCC - C1 P1

C10

Capacitance

U3 ~RESET - SW1 P1

Resistance

500 Ω

R14 P2 - J8 DO

D1 2 - GND GND

Resistance

500 Ω

Resistance

500 Ω

U4 VCC - C22 P1

R13 P2 - J8 DI

D1 2 - GND GND

R15

Resistance

500 Ω

C21

Capacitance

Inductance

R10

Resistance

500 Ω

C17

Capacitance

Resistance

500 Ω

Capacitance

18pF

U2 IN - C5 P1

D1 2 - GND GND

R16

Resistance

500 Ω

D1 2 - GND GND

R15 P2 - J8 SCK

C16

Capacitance

R13

Resistance

500 Ω

J24V_IN 1 - D1 1

U3 XTAL1 - C7 P1

Capacitance

18pF

J3 Pin_1 - U3 PD3

U3 XTAL1 - C7 P1

Capacitance

U3 VCC - C1 P1

C14

Capacitance

R5 P1 - C18 P2

J4 Pin_1 - U3 PH1

C12

Capacitance

Not Recommended for New Designs

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.5k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Project Name

Description

Sterilizer Control PCB v0 – Enhanced Communication and Peripherals Interfaces

Properties

Load Capacitor 2 Designator

I2C SDA Connections

I2C SCL Connections

Load Capacitor 1 Nets

Digital Outputs

MCU_IO_Report (Step 2.3)

MCU_IO_Report (Step 2.2)

System Architecture

UART2 Header

Load Capacitor 2 Nets

Load Capacitor 1 Designator

Series Resistor Nets

Crystal Nets

PWR_24V_5V_ERC_Critical_Issues

PWR_24V_5V_DRC_Reviews

Crystal Designator

System Architecture

UART1 Header

Conditioned Digital Inputs

PWR_24V_5V_ERC_Reviews

ESD_Protection_Note

Series Resistor Designator

PWR_24V_5V_Review_Summary

SPI Interface Mapping

MCU Designator

PWR_24V_5V_DRC_Critical_Issues

MCU_IO_Report (Step 2.4)

Conditioned Input ToDo

COMMS_Pinouts

Pricing & Availability

Distributor	Qty 1
Arrow	$28.53–$37.92
Digi-Key	$41.35–$43.22
LCSC	$24.30–$25.35
Mouser	$25.89–$26.57
TME	$22.84
Verical	$34.21–$45.33

Assets

Assets are files uploaded to this project which can be used in various ways.

Controls

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