# ATmega32U4 Macropad ## 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:** spaceanddinoboy - **Created:** 7/20/2026 - **Last Updated:** 7/22/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### D1 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Part Type: Switching Diode - JLCPCB Part Class: Extended Part - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 - Role: Switching - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html **Pins:** - A [pin 2] - C [pin 1] ### D10 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - LCSC Part Number: C129216 - Manufacturer Name: TC(德昌) - JLCPCB Part Class: Extended Part - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - Part Type: Switching Diode - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - 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 **Pins:** - A [pin 2] - C [pin 1] ### D11 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - JLCPCB Part Class: Extended Part - Part Type: Switching Diode - Role: Switching - LCSC Part Number: C129216 - Manufacturer Name: TC(德昌) **Pins:** - A [pin 2] - C [pin 1] ### D12 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - LCSC Part Number: C129216 - Manufacturer Name: TC(德昌) - JLCPCB Part Class: Extended Part - Part Type: Switching Diode - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Role: Switching - 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 **Pins:** - A [pin 2] - C [pin 1] ### D2 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Part Type: Switching Diode - JLCPCB Part Class: Extended Part - Role: Switching - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 **Pins:** - A [pin 2] - C [pin 1] ### D3 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Part Type: Switching Diode - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - Role: Switching **Pins:** - A [pin 2] - C [pin 1] ### D4 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - 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 - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Part Type: Switching Diode - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - C [pin 1] ### D5 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info 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 - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Part Type: Switching Diode - Role: Switching - JLCPCB Part Class: Extended Part - Role Details: Keyboard input isolation diode, SOD-123 1N4148W **Pins:** - A [pin 2] - C [pin 1] ### D6 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - JLCPCB Part Class: Extended Part - Part Type: Switching Diode - LCSC Part Number: C129216 - Manufacturer Name: TC(德昌) - Role: Switching - Manufacturer Part Number: 1N4148W D1 - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Role Details: Keyboard input isolation diode, SOD-123 1N4148W **Pins:** - A [pin 2] - C [pin 1] ### D7 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Product Info 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 - Manufacturer Name: TC(德昌) - LCSC Part Number: C129216 - Part Type: Switching Diode - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - C [pin 1] ### D8 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - JLCPCB Part Class: Extended Part - Part Type: Switching Diode - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - LCSC Part Number: C129216 - Role: Switching - Manufacturer Name: TC(德昌) **Pins:** - A [pin 2] - C [pin 1] ### D9 — [1N4148W D1](https://www.flux.ai/lcsc/1n4148w-d1~stdq.md) - Manufacturer Name: TC(德昌) - Role: Switching - LCSC Part Number: C129216 - Role Details: Keyboard input isolation diode, SOD-123 1N4148W - Part Type: Switching Diode - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C129216.html - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Manufacturer Part Number: 1N4148W D1 **Pins:** - A [pin 2] - C [pin 1] ### ENC1 — [PEC11R-4215F-S0024](https://www.flux.ai/vasyl/pec11r-4215f-s0024~u3j.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Human Interface - Manufacturer Name: Bourns Inc. - Role Details: EC11-style rotary encoder substitute with A/B channels and pushbutton; final mechanical fit to be checked against case STEP - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/PEC11R.pdf - Manufacturer Part Number: PEC11R-4215F-S0024 - Part Type: Encoder **Pins:** - ~ [pin 1] - ~ [pin 2] - A [pin A] - B [pin B] - COM [pin COM] - SHIELD [pin S1] - SHIELD__1 [pin S2] ### F1 — [0603L050YR](https://www.flux.ai/adrian95/0603l050yr~cqy.md) - Datasheet URL: https://www.littelfuse.com/assetdocs/resettable-ptcs-0603l-datasheet?assetguid=879563f9-97a7-4e71-adba-37de085b333f - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Fuse - Manufacturer Part Number: 0603L050YR - Role Details: USB VBUS overcurrent protection, 500 mA hold PTC; expected load well below hold current - Role: Protection - Manufacturer Name: Littelfuse Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — [TYPE-C-2.0-16PIN-SMT-3-OR](https://www.flux.ai/lcsc/type-c-2p0-16pin-smt-3-or~957d.md) - Part Type: USB Connectors - Package or Case Code: USB-SMD_TYPE-C16PIN-1 - Role Details: 16-pin SMD USB-C device connector - Manufacturer Part Number: TYPE-C-2.0-16PIN-SMT-3-OR - Manufacturer Name: CIKI(皓富) - LCSC Part Number: C2987387 - JLCPCB Part Class: Extended Part - Role: Connector **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] ### SW_RESET — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Role Details: Manual reset button from RESET to GND - Manufacturer Name: XUNPU(讯普) - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - LCSC Part Number: C720477 - Role: Switching - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Part Type: Tactile Switches - Manufacturer Part Number: TS-1088-AR02016 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW1 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Role: Connector - Part Type: Connector - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Role Details: MX-compatible hotswap key switch socket - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - LCSC Part Number: C2803348 - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW10 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Role Details: MX-compatible hotswap key switch socket - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - LCSC Part Number: C2803348 - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Manufacturer Part Number: CPG151101S11-16 - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector - Role: Connector - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW11 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - LCSC Part Number: C2803348 - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Role: Connector - Role Details: MX-compatible hotswap key switch socket - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - LCSC Part Number: C2803348 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Manufacturer Part Number: CPG151101S11-16 - Role: Connector - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Role Details: MX-compatible hotswap key switch socket **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW3 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Role: Connector - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Manufacturer Part Number: CPG151101S11-16 - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - LCSC Part Number: C2803348 - Role Details: MX-compatible hotswap key switch socket **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW4 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - LCSC Part Number: C2803348 - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - 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 - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW5 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Role: Connector - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - LCSC Part Number: C2803348 - Role Details: MX-compatible hotswap key switch socket - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW6 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Role: Connector - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - Role Details: MX-compatible hotswap key switch socket - LCSC Part Number: C2803348 - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Manufacturer Part Number: CPG151101S11-16 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW7 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Role Details: MX-compatible hotswap key switch socket - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - LCSC Part Number: C2803348 - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - Role: Connector - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW8 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Role: Connector - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Manufacturer Part Number: CPG151101S11-16 - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - LCSC Part Number: C2803348 - Role Details: MX-compatible hotswap key switch socket - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW9 — [Kailh MX hot-swap socket](https://www.flux.ai/whitelynx/kailh-mx-hot-swap-socket~4f.md) - Datasheet URL: http://www.kailh.com/product/Ms/rcb/CPG151101S11-16.pdf - Role: Connector - Manufacturer Name: Dongguan City Kaihua Electronics Co., Ltd. - Manufacturer Part Number: CPG151101S11-16 - LCSC Part Number: C2803348 - Role Details: MX-compatible hotswap key switch socket - Product Info Url: http://www.kailh.com/en/Products/Ks/HPC/ - Credits: 3D model by Baco, retrieved from https://grabcad.com/library/kailh-hot-swap-socket-1 - Part Type: Connector - Product Image Url: https://grabcad.com/library/kailh-hot-swap-socket-1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ATMEGA32U4-AU](https://www.flux.ai/cherepanyadima/atmega32u4-au.md) - Part Type: Integrated Circuits - Role: MCU - Role Details: ATmega32U4 TQFP-44, native USB HID controller - Manufacturer Name: Microchip - Manufacturer Part Number: ATMEGA32U4-AU - Symbol Style: parametric-v1 - Datasheet URL: http://www.atmel.com/images/atmel-7766-8-bit-avr-atmega16u4-32u4_summary.pdf - Package or Case Code: 32-TQFP **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://www.flux.ai/vasy_skral/usblc6-2sc6~g1b.md) - Role Details: USB 2.0 D+/D- low-capacitance ESD array - Manufacturer Part Number: USBLC6-2SC6 - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Protection - 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 - LCSC Part Number: C7519 - Symbol Style: parametric-v1 - Manufacturer Name: STMicroelectronics **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://www.flux.ai/adrian95/abm7-16000mhz-d2y-t~mq5.md) - Datasheet URL: https://abracon.com/Resonators/abm7.pdf - Manufacturer Part Number: ABM7-16.000MHZ-D2Y-T - Part Type: Oscillator - Frequency: 16MHz - Manufacturer Name: Abracon LLC - Role Details: 16 MHz crystal for ATmega32U4 external oscillator - Role: Timing **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/spaceanddinoboy/atmega32u4-macropad~ub](https://www.flux.ai/spaceanddinoboy/atmega32u4-macropad~ub).* --- *Generated from [https://www.flux.ai/spaceanddinoboy/atmega32u4-macropad~ub](https://www.flux.ai/spaceanddinoboy/atmega32u4-macropad~ub)*