Imported from GitHub: u1f992/atmega32u4-prototyping-board · commit 13174eb · license CERN-OHL-S-2.0

Description

The simple development board featuring only the essential components for the ATmega32U4.

README

atmega32u4-prototyping-board

The simple development board featuring only the essential components for the ATmega32U4: bypass capacitors, USB Type-C connector, clock circuit, and a pull-up resistor for RESET.

The VBUS and 5V input lines are separated, allowing you to switch between self-powered and bus-powered modes via external wiring.

• ATmega32U4 datasheet

Ceramic Resonator Selection

The base part number of the ceramic resonator used in compact Arduino-compatible boards with the ATmega32U4 appears to be Murata's CSTNE16M0V* (reference). Suitable ceramic resonators can be searched using Murata’s SimSurfing: IC-タイミングデバイス検索ツール. Since the ATmega32U4 itself is not listed, searches were performed using ATmega32M1 and ATmega32C1 instead.

The difference between CSTNE16M0V53C000R0 and CSTNE16M0VH3C000R0 lies in their frequency tolerance, with the latter offering higher precision. The former is more affordable, so it is the one being used.

• CSTNE16M0V53C000R0|セラミック発振子/水晶振動子|タイミングデバイス|村田製作所
• CSTNE16M0V53C000R0 footprint & symbol by Murata | SnapMagic Search

IC品名	IC備考	ICメーカー	品番	適用用途1	ステータス2	発振周波数[MHz]	周波数許容偏差	CL1[pF]3	CL2[pF]4	Rf[ohm]	Rd[ohm]	IC電圧(min.)[V]	IC電圧(max.)[V]	使用温度(min.)[deg.C]	使用温度(max.)[deg.C]	IC Application
ATmega32M1	CKSEL:111	Microchip	CSTNE16M0V53C000R0	APS	生産中	16	+/-0.5%	15	15	Open	0	4.5	5.5	-40	125
ATmega32M1	CKSEL:111	Microchip	CSTNE16M0VH3C000R0	APS	生産中	16	+/-0.07%	15	15	Open	0	4.5	5.5	-40	125

IC品名	IC備考	ICメーカー	品番	適用用途1	ステータス2	発振周波数[MHz]	周波数許容偏差	CL1[pF]3	CL2[pF]4	Rf[ohm]	Rd[ohm]	IC電圧(min.)[V]	IC電圧(max.)[V]	使用温度(min.)[deg.C]	使用温度(max.)[deg.C]	IC Application
ATmega32C1	CKSEL:111	Microchip	CSTNE16M0V53C000R0	APS	生産中	16	+/-0.5%	15	15	Open	0	4.5	5.5	-40	125
ATmega32C1	CKSEL:111	Microchip	CSTNE16M0VH3C000R0	APS	生産中	16	+/-0.07%	15	15	Open	0	4.5	5.5	-40	125

License

The design data for this board is provided under the CERN-OHL-S license. However, the symbol, footprint, and 3D model for library/CSTNE16M0V53C000R0 are provided via SnapMagic Search and are licensed under CC BY-SA (Design Exception 1.0) (reference).

Footnotes

1. ↩ ↩²
2. ↩ ↩²

3. 水晶振動子：外付け容量セラロック：内蔵容量 ↩ ↩²

4. 水晶振動子：外付け容量セラロック：内蔵容量 ↩ ↩²