Orchard EVT1 to DVT1

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Revision as of 07:54, 25 April 2015 by Bunnie (talk | contribs) (ECO3: Fix gas gauge topology)
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ECO1: Fix Microphone mirroring

Microphone schematic symbol was mirrored. No BOM change, board layout change only.

ECO2: Make battery easier and safer to solder

Space battery terminals wider, increase pad size, and add solder mask openings around the battery tabs. This makes it less likely to short wires together during a botched soldering operation.

ECO3: Fix gas gauge topology

Gas gauge goes between the charger and battery, not between the charger and the system. Oops!

ECO4: Add isolation resistors on SPI to OLED=

For independent I2C operation of the OLED and complete dedication of the SPI bus to BLE, isolation resistors are needed on SPI1_SCK and SPI1_MOSI to the OLED display.

DVT1 DVT2 Notes
added R19D 0 ohm
added R20D 0 ohm