72 lines
2.2 KiB
Markdown
72 lines
2.2 KiB
Markdown
This variant attempts to be as faithful to the Blackmagic mini as
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possible, but also has several differences. This board has been built
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and functions.
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## Details
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* The schematic and board have both been designed using Cadsoft EAGLE
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v6.4.0.
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* The board size is 40mm x 16mm.
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* The programming connector is an ARM 10-PIN Interface as described
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[here](http://www.keil.com/support/man/docs/ulink2/ulink2_hw_connectors.htm).
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## Differences
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### Uses 0603 [1608 Metric] components
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The layout is intended for reflow soldering.
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### Includes Level Translator
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This board incorporates the same level translator used in the
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full-sized Blackmagic, so it can be used to safely program 2.7V or
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1.8V systems.
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### USART Connector
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The STM32F103's USART1 peripheral is broken out into a 0.1"
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header. The hole centres are
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[slightly offset to allow a press-fit](https://www.sparkfun.com/tutorials/114).
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### BOOT0 Button
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As well as the standard button for entering USB DFU mode, this variant
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also provides a button for pulling the BOOT0 pin high to activate the
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STM32 SystemMemory bootloader. Hold this button when plugging in the
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module to enter then bootloader mode. Then
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[scripts/bootprog.py](scripts/bootprog.py) can be used to program and
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reprogram the chip over the USART1 interface.
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This is useful for programming a brand new or 'bricked' blackmagic
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with the DFU firmware (src/blackmagic_dfu.bin), the standard DFU mode
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should be used for regular firmware updates.
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## Parts and Costings
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* [Parts List](Parts.md)
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Parts Cost (Approximate): £14 + VAT
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([uk.farnell.com](http://uk.farnell.com) August 2013)
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Programming Cable: £8.49 + VAT
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([uk.farnell.com](http://uk.farnell.com/samtec/ffsd-05-d-06-00-01-n/ribbon-cable-idc-152-4mm-grey-10way/dp/1667659)
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August 2013)
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## Assembly Photos
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### Blank PCB:
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### Solder Paste Stencil:
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