t3ddftw / BlueBus - History

[IMP] hardware: BlueBus Rev A v4
* Add quad tri-state buffer to make system UART selectable between the MCU and BT module
* Replace MCP2221A with FT232RQ in order to be able to use even parity UART for BT Module firmware updates

[IMP] hardware: Clean up traces
* Clean up trace runs so we use less VIAs
* Ensure that VIAs are not mid-trace on signal lines

[IMP] hardware: PCM5102AQ1 fixes
* Remove +3.3 from LDOO caps
* Wire XSMT & FMT back to +3.3
* Rewire feedback pin of +5v switching regulator

[IMP] hardware: BlueBus Rev A
* Improve Silkscreen
* Rewire a couple of nets to reduce via count
* Move passives into better alignment

[IMP] hardware: BlueBus Rev A
* Improve Silkscreen
* Rewire a couple of nets to reduce via count
* Move passives into better alignment

[IMP] hardware: BlueBus Rev A
* Remove TPA6017A2 in favor of PCM5102A Line Level DAC which will fix quality issues
* Completely new layout of board and schematic
* Update Silkscreen to use vector fonts of consistent sizes
* Resize board to 45mm x 70mm from 55mm x 90mm
* Update design of transient filter to prevent voltage drops at boot
* Add DSP Output SMB connector
* Add circuit for mono microphone input
* Add 1.5A Littleblock Fuse to prevent over-current
* Miter board corners for rounded look

[FIX] hardware: BlueBus v7
* Update Silkscreen for Speaker outputs
* Rewire Speaker negative outputs to support single ended operation without overheating
* Place 10uF cap for TPA6017A2 near input of 5v so all VDDs can benefit from it
* Connect TPA6017A2 N/C pin to GND
* Move TPA6017A2 gain resistor
* Rewire transient filter for BC127 on the 3.3v rail per application note
* Update placement of several passives for alignment
* Update passive names to move from bottom right to left, to top right to left
* Update Silkscreen with GitHub address

[IMP] hardware: Silkscreen / Power rail update
* Adjust silkscreen text for PICKIT to locate it below the pins, rather than under
* Remove 45 degree angles from 3.3v rail to PIC24
* Remove skew from the VIN wiring near the 100uF cap

[ADD] hardware: Update PWP
* Correctly add tStop/bStop layer to TPA6017A2 to remove silkscreen from thermal pad