AT85DVK-07 Development Board User Guide
4-25
4391B–MP3–07/07
Section 4
Development Board Errata List
4.1
Board V1.0.0
•
On-Board 3V DC-DC - Bad Startup
DC-DC is not properly maintained after power-up.
Workaround:
Do not use external DC-DC: power the board using USB cable.
•
Microphone Input - DC Decoupling
The decoupling capacitor is missing between microphone and MICIN input.
Workaround:
Add 1uF capacitor between microphone and MICIN input (layout cut).
•
External DAC - Conflict Using SPI/SIO Interface
External DAC being controlled by the SPI/SIO lines, SPI or SIO transfers are
disturbed by the SPI_DOUT line when SPI_CSB line is asserted.
Workaround:
Insulate SPI DAC control lines (layout cut).
•
LCD - Display Stability @ 1.8V
The display shows flickering when operating @ 1.8V (LCD charge pump issue).
Workaround:
None.
4.2
Board V1.0.1
•
LCD - Display Stability @ 1.8V
The display shows flickering when operating @ 1.8V (LCD charge pump issue).
Workaround:
None.
