Board
About the Board
Board is an open source FPGA PCB design by Roboy, published on GitHub under the BSD-3-Clause license. It is a 4-layer board measuring 65 × 39 mm, with 128 components from 59 distinct parts.
Its main chip is the iCE40-LP8K-CM81, from the FPGA family. Other key parts include the LTC2855CDEPBF, LM2903, TLI4970, EEPROM and MIC5504-3.3YM5-TR. By type, the board carries 44 capacitors, 41 resistors, 11 ICs, 10 connectors, 6 transistors and 5 diodes.
From the project
next level motorboard
Main components on the Board
Board bill of materials (BOM)
128 components, 59 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LTC2855CDEPBF | ltc2855 | U1 |
| 2 | LM2903 | TSSOP-8_4.4x3mm_P0.65mm | U2, U5 |
| 1 | TLI4970 | TLI4970 | U3 |
| 1 | EEPROM | SOT-23-5 | U4 |
| 1 | MIC5504-3.3YM5-TR | SC70-5 | U6 |
| 1 | MIC5365-1.2YC5-TR | SC-70-C5 | U7 |
| 1 | iCE40-LP8K-CM81 | CM81 | U8 |
| 1 | AT25SF081-SSHD-B | SOIC-8_3.9x4.9mm_P1.27mm | U9 |
| 1 | DSC6001CI2A-016.0000T | CDFN3225-4LD-PL-1 | U10 |
| 1 | TXB0104PW | TSSOP-14_4.4x5mm_P0.65mm | U11 |
| 6 | BSZ100N06NS-DS | VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | ENCODER0 | micro_match_female_10pos_SMT | J1 |
| 1 | PHASES | PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | POWER_IN | Wago_2060_2_SMD | J3 |
| 1 | ENCODER1 | micro_match_female_8pos_SMT | J4 |
| 1 | UART | TE-Connectivity_Micro-Match_connector_02x03_Pitch_1.27mm | J5 |
| 1 | USB_OTG | USB_Micro-B_Molex_47346-0001 | J6 |
| 1 | FLASH_PORT | TC2030-MCP-NL | J7 |
| 1 | POWER_OUT | Wago_2060_2_SMD | J8 |
| 1 | i2c | TE-Connectivity_Micro-Match_connector_02x02_Pitch_1.27mm | J9 |
Show 39 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RF_Shield_Two_Pieces | Laird_Technologies_BMI-S-201-F_13.66x12.70mm | J10 |
| 2 | 0.1uF | C_0402_1005Metric | Cf1, Cf2 |
| 1 | DRV8323HRTA | QFN-40-1EP_6x6mm_Pitch0.5mm | DRV8323H1 |
| 1 | LABEL | R1_eyes_mask_5.5mm | H4 |
| 1 | LABEL | R1_face_mask_5.5mm | H5 |
| 1 | MAX17632 | QFN-16-1EP_3x3mm_Pitch0.5mm | MAX176321 |
| 1 | 10k | R_0402_1005Metric | Rled1 |
| 1 | SW_DIP_x02 | SW_DIP_SPSTx02_Slide_Copal_CHS-02B_W7.62mm_P1.27mm | SW1 |
| 1 | SW_Push | PTS_810_SMT_Switch | SW2 |
| 1 | LED | LED_0603_1608Metric | D1 |
| 1 | D_TVS | D_0603_1608Metric | D2 |
| 1 | SK6812MINI | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D3 |
| 2 | LED_Small | LED_0402_1005Metric | D4, D5 |
| 1 | 10uH | XAL5050-103MEC | L1 |
| 1 | Bead | L_0603_1608Metric | L2 |
| 3 | 10uF | C_0402_1005Metric | C1, C15, C38 |
| 14 | 0.1uF | C_0402_1005Metric | C2, C6, C11, C13, C14, C16, C22, C23 +6 |
| 6 | 1uF | C_0402_1005Metric | C3, C5, C17, C26, C28, C36 |
| 1 | 47nF | C_0402_1005Metric | C4 |
| 6 | 22uF/50V | C_0805_2012Metric | C7, C18, C19, C20, C21, C30 |
| 2 | 2.2uF | C_0603_1608Metric | C8, C9 |
| 1 | 5600pF | C_0402_1005Metric | C10 |
| 1 | 22uF | C_0805_2012Metric | C12 |
| 1 | 220uF | CP_Elec_8x10 | C25 |
| 5 | 100u/6.3V | C_0805_2012Metric | C31, C32, C34, C35, C40 |
| 4 | 10nF | C_0402_1005Metric | C37, C39, C42, C43 |
| 1 | 18k -> 570/1140mA | R_0402_1005Metric | R1 |
| 16 | 10k | R_0402_1005Metric | R3, R4, R12, R13, R14, R15, R27, R33 +8 |
| 12 | 1k | R_0402_1005Metric | R5, R6, R7, R8, R9, R10, R11, R16 +4 |
| 1 | 75k -> 260/520mA | R_0402_1005Metric | R19 |
| 1 | >500k -> 1xPWM | R_0402_1005Metric | R24 |
| 1 | 47k -> 3xPWM | R_0402_1005Metric | R25 |
| 1 | >500k -> 120/240mA | R_0402_1005Metric | R28 |
| 1 | 75k -> 60/120mA | R_0402_1005Metric | R29 |
| 1 | 18k -> 30/60mA | R_0402_1005Metric | R30 |
| 1 | 100 | R_0402_1005Metric | R39 |
| 1 | 1.5k | R_0402_1005Metric | R40 |
| 2 | 68 | R_0402_1005Metric | R41, R42 |
| 2 | 270 | R_0402_1005Metric | R43, R44 |
Board design files
The KiCad project lives in the Roboy/iceboard repository on GitHub; these links point at the commit this page was built from.
Board: common questions
What microcontroller does the Board use?
The Board is built around the iCE40-LP8K-CM81, from the FPGA family.
How big is the Board?
The Board measures 65 × 39 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Board?
128 components, from 59 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Board design files?
From the Roboy/iceboard repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Board design in my own project?
Yes, under the terms of its BSD-3-Clause license, which Roboy chose for the repository.
Can I test firmware for the Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug FPGA firmware against it before you order a PCB.
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