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Page last modified 12:57, 29 Dec 2010 by stephan
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nano Universal BaseboardFrom $1Table of contents
Overview
It features 8x 20 pin headers, for test and debugging or for inserting plugin modules with application specific hardware. Additionally there are misc physical layer connectors like USB Host and Device, RS232, CAN or Ethernet, the utilization of which can be defined by optional standard or application specific physical layer modules. If required, the board is also available with a DIN 41612 bus connector for connection of multiple baseboards through a backplane. The test connectors pinout is compatible with HP165xx/167xx logic analyzer termination adapters (01650-63203), so debugging is easy. The connectors are placed in a 100mil/2.54mm grid to allow for mounting a standard breadboard PCB on top for prototyping. The board has Euro-PCB standard dimensions (160x100mm), so lots of standard cases will fit. Quick Start
Hardware DescriptionConnectorsBTB ConnectorsThe Zemu / Zefant nano module is inserted here. X201 is the "North" connector, X202 is the "South" connector. Please insert and remove the module carefully! Do not use force and always push and pull straight. External ConnectorsDC Input X1001DC Input is a 2.1/5.5mm DC connector. Center pin is positive. The input is protected against wrong polarity. Nothing will be damaged, but the system will not run. VCP USB X503Data lines only connected to PHY header, no direct connection to the Zefant/Zemu module. A PHY module inserted on the PHY header can utilize this port. Additionally this port allows for powering the system from USB 5V. Please set jumper X1002 accordingly and note that there is no overcurrent protection! Do never draw more than 500mA out of a USB port! 2x SubD9 (RS232 or CAN) X601A/BThese connectors are only connected to the PHY header, no direct connection to the Zefant/Zemu module. A PHY module inserted on the PHY header can utilize these ports. Ethernet X801These connectors are only connected to the PHY header, no direct connection to the Zefant/Zemu module. There are two ways to use this connector:
USB Host X701This port is directly connected to the according Zemu/Zefant PHY pins. If for example a Zemu-nano ARM7 module is inserted, the integrated USB Host controller can use this port. Additionally the signal pins are also available on the PHY header for potential later use. USB Device X702This port is directly connected to the according Zemu/Zefant PHY pins. If for example a Zemu-nano ARM7 module is inserted, the integrated USB Device controller can use this port. Additionally the signal pins are also available on the PHY header for potential later use. Test Connectors X301-X308The test connectors Bus Connector X401If occupied, this optional DIN 41612 connector allows using the baseboard as a module in a backplane. The pinout is proprietary. For a Zemu-nano module most of the signals are memory bus signals, for the Zefant-nano FPGA module the signals are generic anyway. JTAG ConnectorsThere are 2 JTAG connectors:
Pinouts to be inserted here. Solder Bridge ConfigurationThere are 4 solder Bridges on the baseboard to set which I/O voltage is made available on the test connectors:
Do not bridge between pads 1 and 3 on any of these solder bridges! Mechanical DimensionsMain Dimensions are 100mm x 160mm. All other dimensions are shown in the drawing:
Software and ResourcesLinksAll resources and software downloads for the Zefant-nanoV4 can be downloaded from the subversion repository. You can access the repository here:
* like Tortoise for example. Repository HierarchyThe most important directories of the repository will be mentioned in this incomplete list. It will pay out to browse the repository by yourself!
Additional Files in external RepositoriesNote that the following repositories might be of interest as well:
Version History / ErrataV1.1not released yet. V1.01Fixed the mixed I/O voltage pins from V1.0. V1.0There is a wired patch on this version of the baseboard: The Zefant/Zemu-nano modules have I/O voltage pins for VCC33, VCCIO16 and VCCIO248 on top and bottom side of the module. To avoid short circuits in a stack of Zefant-nano FPGA modules they are located on different pins for top and bottom side as shown in the table:
On the V1.0 baseboard top and bottom pinout have been mixed by mistake, so Pins 2,4,6,8 of X201 were not connected and the respective pins were located on pins 1,3,5,7. This has been fixed by simply setting bridges:
on both connectors. No signals had to be dsiconnected from Pins 1,3,5,7, because these pins are unconnected on the module anyway. Note that the pinout in the attached schematic is V1.01 and therefore already reflects the correct pinout! Please do also note, that the described fix actually requires only 3 wires, because VCC33 is the same on both connectors, needs to be connected only once. So, don't worry, if you see only 3 wires. One on X901 and two on X1001 or vice versa.
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This Baseboard is a simple evaluation platform for the Zefant-nanoV4 and Zemu-nano Modules.
