Difference between revisions of "Zero2/Hardware/Revisions"

Known issues:

• Lack of clearance around microSD card slot resulting the card will be blocked for insertion. (Workaround: lift the card corner slightly during insertion, so the card can "sit" on that blocking component when fully inserted)
• TYPE-C headers are slightly misaligned.
• PCB mounting hole location is different from Zero, as such a proposed universal case cannot share holes on the USB connector side.
• USB 3 port may not be recognized by the board. (Manually fixed on sample boards)
• GPIO pin 16 and 24 are connected on the same bus. 16 will be replaced by SARADC_CH1.
• GPIO pin 36 is an open drain pin. Works fine for input but need pull up for output.
• Fan's PWM generator is occupied by VDDCPU_B. Preferably an unused PWM pin should go there. Otherwise gpio-fan will be used in device tree.
• Green LED might be too bright

• Fix microSD card clearance.
• Pin 16 is now connected to GPIOZ_8.
• Pin 22 is now connected to GPIOZ_9.
• Pin 36 is now pulled up.
• Fan is now connected to GPIOAO_11 (PWMAO_A).
• Relocated fan header, and switched to a smaller CSI connector.
• Update CSI, DSI pin definition.
• Switch wireless module from AP6256 to AW-CM256SM, which requires different firmware. Distro developers are recommended to include firmwares for both modules.

Proposed changes:

• Point fan header to the side of the board.