# ATmega32U4 Macropad gUGp

## Description

Production\-intent USB\-C macropad based on ATmega32U4 TQFP\-44 with 11 Cherry\-MX hotswap keys, EC11 encoder, per\-key diodes, USB ESD protection, and deferred routing until case STEP alignment\.

## Project Details

- **Owner:** sfsds
- **Created:** 8/5/2026
- **Last Updated:** 8/5/2026
- **Visibility:** Public

## Key Components

### D1 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role: Switching
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D10 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Role: Switching
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D11 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Role: Switching
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D12 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Role: Switching
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D2 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Role: Switching
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D3 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Role: Switching
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D4 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role: Switching
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D5 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Role: Switching
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D6 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Role: Switching
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D7 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Role: Switching
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D8 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Role: Switching
- LCSC Part Number: C129216
- Part Type: Switching Diode

**Pins:**
- A [pin 2]
- C [pin 1]

### D9 — [1N4148W D1](https://flux.ai/lcsc/1n4148w-d1~stdq.md)

- Role: Switching
- Datasheet URL: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- Manufacturer Part Number: 1N4148W D1
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TC\(德昌\)
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_1N4148W\_C129216\.html
- LCSC Part Number: C129216
- Part Type: Switching Diode
- Role Details: Keyboard input isolation diode, SOD\-123 1N4148W

**Pins:**
- A [pin 2]
- C [pin 1]

### ENC1 — [PEC11R\-4215F\-S0024](https://flux.ai/vasyl/pec11r-4215f-s0024~u3j.md)

- Datasheet URL: https://www\.bourns\.com/docs/Product\-Datasheets/PEC11R\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Encoder
- Role: Human Interface
- Role Details: EC11\-style rotary encoder substitute with A/B channels and pushbutton; final mechanical fit to be checked against case STEP
- Manufacturer Part Number: PEC11R\-4215F\-S0024
- Manufacturer Name: Bourns Inc\.

**Pins:**
- \~ [pin 1]
- \~ [pin 2]
- A [pin A]
- B [pin B]
- COM [pin COM]
- SHIELD [pin S1]
- SHIELD\_\_1 [pin S2]

### F1 — [0603L050YR](https://flux.ai/adrian95/0603l050yr~cqy.md)

- Role Details: USB VBUS overcurrent protection, 500 mA hold PTC; expected load well below hold current
- Manufacturer Name: Littelfuse Inc\.
- Role: Protection
- Manufacturer Part Number: 0603L050YR
- Datasheet URL: https://www\.littelfuse\.com/assetdocs/resettable\-ptcs\-0603l\-datasheet?assetguid=879563f9\-97a7\-4e71\-adba\-37de085b333f
- Part Type: Fuse
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J1 — [TYPE\-C\-2\.0\-16PIN\-SMT\-3\-OR](https://flux.ai/lcsc/type-c-2p0-16pin-smt-3-or~957d.md)

- Role Details: 16\-pin SMD USB\-C device connector
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: TYPE\-C\-2\.0\-16PIN\-SMT\-3\-OR
- Role: Connector
- Manufacturer Name: CIKI\(皓富\)
- LCSC Part Number: C2987387
- Part Type: USB Connectors
- Package or Case Code: USB\-SMD\_TYPE\-C16PIN\-1

**Pins:**
- 17 [pin 17]
- 18 [pin 18]
- 19 [pin 19]
- 20 [pin 20]
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin B1A12]
- GND [pin A1B12]
- SBU1 [pin A8]
- SBU2 [pin B8]
- VBUS [pin A4B9]
- VBUS [pin B4A9]

### LED1 — [WS2812B](https://flux.ai/kicad-part-library/ws2812b~l5u.md)

- Package or Case Code: LED\_WS2812B\_PLCC4\_5\.0x5\.0mm\_P3\.2mm
- Role: Addressable RGB LED
- Datasheet URL: https://cdn\-shop\.adafruit\.com/datasheets/WS2812B\.pdf
- Manufacturer Part Number: WS2812B
- Part Type: LED SMD
- Role Details: Single WS2812B status LED driven from ATmega32U4 PB0

**Pins:**
- DIN [pin 4]
- DOUT [pin 2]
- VDD [pin 1]
- VSS [pin 3]

### SW\_RESET — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Role: Switching
- Manufacturer Name: XUNPU\(讯普\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Role Details: Manual reset button from RESET to GND
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW1 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Role: Connector
- Role Details: MX\-compatible hotswap key switch socket
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW10 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Role: Connector
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role Details: MX\-compatible hotswap key switch socket

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW11 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Role Details: MX\-compatible hotswap key switch socket
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role: Connector

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW2 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Role Details: MX\-compatible hotswap key switch socket
- Role: Connector
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW3 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Role Details: MX\-compatible hotswap key switch socket
- Role: Connector
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW4 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Role: Connector
- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Role Details: MX\-compatible hotswap key switch socket
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW5 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role Details: MX\-compatible hotswap key switch socket
- LCSC Part Number: C2803348
- Role: Connector
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW6 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Role: Connector
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role Details: MX\-compatible hotswap key switch socket

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW7 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Role Details: MX\-compatible hotswap key switch socket
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role: Connector

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW8 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Role Details: MX\-compatible hotswap key switch socket
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- Role: Connector
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW9 — [Kailh MX hot\-swap socket](https://flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md)

- Role: Connector
- Product Info Url: http://www\.kailh\.com/en/Products/Ks/HPC/
- Manufacturer Name: Dongguan City Kaihua Electronics Co\., Ltd\.
- Manufacturer Part Number: CPG151101S11\-16
- Role Details: MX\-compatible hotswap key switch socket
- Part Type: Connector
- Datasheet URL: http://www\.kailh\.com/product/Ms/rcb/CPG151101S11\-16\.pdf
- Credits: 3D model by Baco, retrieved from https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1
- LCSC Part Number: C2803348
- Product Image Url: https://grabcad\.com/library/kailh\-hot\-swap\-socket\-1

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### U1 — [ATMEGA32U4\-AU](https://flux.ai/cherepanyadima/atmega32u4-au.md)

- Role Details: ATmega32U4 TQFP\-44, native USB HID controller
- Package or Case Code: 32\-TQFP
- Role: MCU
- Datasheet URL: http://www\.atmel\.com/images/atmel\-7766\-8\-bit\-avr\-atmega16u4\-32u4\_summary\.pdf
- Manufacturer Part Number: ATMEGA32U4\-AU
- Symbol Style: parametric\-v1
- Manufacturer Name: Microchip
- Part Type: Integrated Circuits

**Pins:**
- \(INT\.6/AIN0\)\_PE6 [pin 1]
- \(OC0B/SCL/INT0\)\_PD0 [pin 18]
- \(PCINT1/SCLK\)\_PB1 [pin 9]
- \(PCINT7/OC0A/OC1C/\~RTS\)\_PB7 [pin 12]
- \(PDI/PCINT2/MOSI\)\_PB2 [pin 10]
- \(PDO/PCINT3/MISO\)\_PB3 [pin 11]
- \(RXD1/INT2\)\_PD2 [pin 20]
- \(SDA/INT1\)\_PD1 [pin 19]
- \(SS/PCINT0\)\_PB0 [pin 8]
- \(TXD1/INT3\)\_PD3 [pin 21]
- \(XCK1/\~CTS\)\_PD5 [pin 22]
- \~RESET [pin 13]
- AREF [pin 42]
- AVCC\_1 [pin 24]
- AVCC\_2 [pin 44]
- D\- [pin 3]
- D\+ [pin 4]
- GND\_1 [pin 15]
- GND\_2 [pin 23]
- GND\_3 [pin 35]
- GND\_4 [pin 43]
- PB4\_\(PCINT4/ADC11\) [pin 28]
- PB5\_\(PCINT5/OC1A/\~OC4B\~/ADC\) [pin 29]
- PB6\_\(PCINT6/OC1B/OC4B/ADC\) [pin 30]
- PC6\_\(OC3A/\~OC4A\) [pin 31]
- PC7\_\(ICP3/CLK0/OC\)4A [pin 32]
- PD4\_\(ICP1/ADC8\) [pin 25]
- PD6\_\(T1/\~OC4D\~/ADC9\) [pin 26]
- PD7\_\(T0/OC4D/ADC10\) [pin 27]
- PE2\_\(\~HWB\) [pin 33]
- PF0\_\(ADC0\) [pin 41]
- PF1\_\(ADC1\) [pin 40]
- PF4\_\(ADC4/TCK\) [pin 39]
- PF5\_\(ADC5/TMS\) [pin 38]
- PF6\_\(ADC6/TDO\) [pin 37]
- PF7\_\(ADC7/TDI\) [pin 36]
- UCAP [pin 6]
- UGND [pin 5]
- UVCC [pin 2]
- VBUS [pin 7]
- VCC\_1 [pin 14]
- VCC\_2 [pin 34]
- XTAL1 [pin 17]
- XTAL2 [pin 16]

### U2 — [USBLC6\-2SC6](https://flux.ai/vasy_skral/usblc6-2sc6~g1b.md)

- Manufacturer Part Number: USBLC6\-2SC6
- Symbol Style: parametric\-v1
- Role Details: USB 2\.0 D\+/D\- low\-capacitance ESD array
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Protection
- Manufacturer Name: STMicroelectronics
- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/06/1d/48/9c/6c/20/4a/b2/CD00050750\.pdf/files/CD00050750\.pdf/jcr:content/translations/en\.CD00050750\.pdf
- Role: Protection
- LCSC Part Number: C7519

**Pins:**
- GND [pin 2]
- I/O1 [pin 6]
- I/O1 [pin 1]
- I/O2 [pin 3]
- I/O2 [pin 4]
- VBUS [pin 5]

### Y1 — [ABM7\-16\.000MHZ\-D2Y\-T](https://flux.ai/adrian95/abm7-16000mhz-d2y-t~mq5.md)

- Manufacturer Name: Abracon LLC
- Frequency: 16MHz
- Role: Timing
- Role Details: 16 MHz crystal for ATmega32U4 external oscillator
- Manufacturer Part Number: ABM7\-16\.000MHZ\-D2Y\-T
- Datasheet URL: https://abracon\.com/Resonators/abm7\.pdf
- Part Type: Oscillator

**Pins:**
- P1
- P2

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/sfsds/atmega32u4\-macropad\-gugp\~2f](https://flux.ai/sfsds/atmega32u4-macropad-gugp~2f).*

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*Generated from [https://flux\.ai/sfsds/atmega32u4\-macropad\-gugp\~2f](https://flux.ai/sfsds/atmega32u4-macropad-gugp~2f)*