.. _frontpanelmainboard_rev02: ============================ Frontpanel Mainboard (Rev02) ============================ The second revision of the PCB-based frontpanel for carrier boards :math:`\geq` Rev05 adds the following features in comparison to :ref:`frontpanelmainboard_rev01`: - The ``3V3isoIOs`` supply has been extended from ~100mA to ~1A maximum output current (for the entire subsystem -- cf. below for connector limits) - All outgoing isoI/Os and 3V3 rails on ``X5`` (External STOP) and ``X6`` (isoIOs) are now protected against overcurrents - The maximum current for all 8+4+2 I²C-based I/Os (i.e., ``IO01``-``8`` and -- if used -- ``FlexIO01``-``4`` on ``X6``, and ``Extra01``-``2`` on ``X5``) is limited to 164mA typ. - The maximum current on the 3V3isoIOs output (connector ``X6`` pin 15) is limited to 601mA typ., and also applies to any enabled ``FlexIO`` output(s) - The maximum short-circuit current on the 3V3isoIOs pin of the External STOP connector is 22mA (cf. ``R44``) - Overcurrent conditions can be reported back to the carrier by means of an OD signal (cf. F̅A̅U̅L̅T̅) on the I²C GPIO (``U8``) - The internal 5V output ``X9`` now uses a Molex connector (instead of a generic 2-pin spring clamp connector) - Supply rail protection on ``X9`` (current limit at 909mA typ.) - Various production-related optimizations (functions unchanged) Downloads --------- - :download:`Schematic Rev02 ` - Please refer to the `uz_frontpanel_main `_ repository for design files, the MPNs of the components used etc.