4 layers137 × 79.5 mm
2 layers21.1 × 53.3 mm
BitConnector
tiband/Tiband-BitConnectorThis is the Tiband version of the BitConnector, a Xilinx XC9572XL CPLD board for breadboard prototyping
- Size
- 21.1 × 53.3 mm
- Copper layers
- 2
- Thickness
- 1.46 mm
- Parts
- 24
- Nets
- 46
- Pads
- 134
- Tracks, vias
- 358, 20
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 Feb 2021
- Updated
- 13 Feb 2021
Overview
BitConnector is an open-source printed circuit board by tiband, from the tiband/Tiband-BitConnector repository on GitHub. It is a 2-layer board of 21.1 × 53.3 mm with 24 parts on 46 nets, routed with 358 tracks and 20 vias.
It is built around the 74LVC2G14GW. Its parts include 7 capacitors, 7 resistors, 3 connectors, 2 ICs and 1 diode. It belongs with the fPGA and programmable logic boards and the FPGA and CPLD boards of this library.
Main components
1README
README.mdBitConnector
The BitConnector is a Complex Programmable Logic Device (CPLD) Board, optimized for hardware-based, digital prototype design on a breadboard. The BitConnector is designed to represent a classic DIP chip in 2.54mm pitch with 2 * 20 pins. Configurations that are present in an HDL/schematic are transmitted via JTAG and stored permanently on the CPLD.
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Usage & Documentation
- there is a detailed German board documentation
- here is the preview for the schematic
- files for board production have also been published in Gerber format
- for a revision overview check: changelog
- for all other questions, there is a KiCad project
| No | DIP-left | CPLD-Pin | comment | DIP-right | CPLD-Pin | comment |
| 1 | CLK | 1 | GCK3 | 3V3 | 15,35 | VccINT |
| 2 | IO2 | 2 | VCC | 26 | VccIO | |
| 3 | IO3 | 3 | IO33 | 44 | GCK2 | |
| 4 | IO4 | 5 | IO32 | 43 | GCK1 | |
| 5 | IO5 | 6 | IO31 | 42 | ||
| 6 | IO6 | 7 | IO30 | 41 | ||
| 7 | IO7 | 8 | IO29 | 40 | ||
| 8 | IO8 | 12 | IO28 | 39 | ||
| 9 | IO9 | 13 | IO27 | 38 | ||
| 10 | IO10 | 14 | IO26 | 37 | ||
| 11 | IO11 | 16 | IO25 | 36 | GTS1 | |
| 12 | IO12 | 18 | IO24 | 34 | GTS2 | |
| 13 | IO13 | 19 | IO23 | 32 | ||
| 14 | IO14 | 20 | IO22 | 31 | ||
| 15 | IO15 | 21 | IO21 | 30 | ||
| 16 | IO16 | 22 | IO20 | 29 | ||
| 17 | IO17 | 23 | IO19 | 28 | ||
| 18 | TCK | 11 | JTAG | IO18 | 27 | |
| 19 | TDO | 24 | JTAG | TDI | 9 | JTAG |
| 20 | GND | 17,25,4 | TMS | 10 | JTAG |
Supplements and notes:
- GSR=Global Reset, GTS=Global Tri-State, GCK=Global Clock
- Pin 33 is connected to the onboard push-button.
- With hardware debouncing, the push-button is high-active, otherwise it is low-active.
Build
| No | component | value | quantity | package |
| 1 | Unpolarized capacitor | 100nF | 3 | 0603 |
| 2 | Unpolarized capacitor | 10nF | 3 | 0603 |
| (3) | Unpolarized capacitor | 100nF | 1 | 0603 |
| (4) | Resistor | 100K | 1 | 0805 |
| (5) | Resistor | 10K | 1 | 0805 |
| 6 | Resistor | 10K | 4 | 0805 |
| 7 | Resistor | 120 | 1 | 0805 |
| 8 | LED | blue | 1 | 1206 |
| 9 | Push button | 6 mm | 1 | THT |
| 10 | Pin Header 1x20 | 2.54 mm | 2 | vertical |
| (11) | 74LVC2G14 | Schmitt-Tr | 1 | SOT457 |
| 12 | XC9536XL/XC9572XL | CPLD | 1 | VQ44/VQG44 |
- You can use the XC9536XL or the more powerful XC9572XL CPLD.
- The BitConverter was designed in a minimal configuration with commercially available components.
- The bracketed components are optional for hardware debouncing/Schmitt trigger action via 74LVC2G14.
- If you make the board without hardware debouncing, please set the solderjumper J1.
- In addition to the schematic, the Gerber files for board production have also been published.
Thanks to:
- Jeremy Heighway for mentoring English grammar and spelling.
- Jana Weigel for graphic design consulting, mentoring German grammar and spelling.
- Lothar Miller for PCB design consulting.
- mikrocontroller.net for failure analysis and life experience ;).
Licence
This project by Michael Krause is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY.
This project is free: you can redistribute it and/or modify it under the terms of CC BY-SA 4.0 Excluded from this licence is the logo(./doc/Figures/Logo.pdf). Should you change or delete something, please remove the logo.
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R6, R7 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4 |
| 3 | 10nF | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | DIP_20_l1, DIP_20_r1 |
| 1 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 74LVC2G14 | Package_SO:SC-74-6_1.5x2.9mm_P0.95mm | U2 |
| 1 | Conn_01x02 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J2 |
| 1 | JTAG | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J1 |
| 1 | LED_blue | LED_SMD:LED_1206_3216Metric_Castellated | D1 |
| 1 | LOGO | logo:tux_logo | G*** |
| 1 | XC95##XL-VQ44 | Package_QFP:LQFP-44_10x10mm_P0.8mm | U1 |
| 1 | disable_schmitt_trigger_action | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | J1 |
| 1 | reset | Button_Switch_THT:SW_PUSH_6mm | SW1 |
Questions
How big is the BitConnector PCB?
It measures 21.1 × 53.3 mm and has 2 copper layers, 1.46 mm thick.
What parts does the BitConnector use?
24 parts, built around the 74LVC2G14GW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the BitConnector KiCad files?
From the tiband/Tiband-BitConnector repository on GitHub, at the commit this page was made from: the board is BitConnector.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the BitConnector design in my own project?
Its repository states no licence, so its author keeps all rights: ask tiband before reusing the design.
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