Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- contiki:zigbit_pcb [2012/05/11 14:38] – sven_zehl
+++ contiki:zigbit_pcb [2017/01/24 18:49] (aktuell) – Externe Bearbeitung 127.0.0.1
@@ Zeile 1: / Zeile 1: @@
 ====== Rough draft for a Zigbit evaluation board ======
+==== Goal: ====
-Needed documents:
-  *(1.)	Data sheet ioMate.USB1 http://lib.chipdip.ru/315/DOC000315066.pdf
-  *(2.)	Data sheet Zigbit module http://mikrocontroller-praxis.de/media/files_public/thlwqtbph/ATZB-24-A2-datasheet.pdf
-  *(3.)	Data sheet Jtag MKII http://www.atmel.com/Images/doc2562.pdf
 The goal of this project is to supply a PCB, which connects the Zigbit module (ATZB-24-A2) with a Jtag Connector and with an io.Mate.USB1.
@@ Zeile 27: / Zeile 18: @@
 {{:contiki:draft2.png?direct&800|}}
-The USB bus supply voltage VCC from the ioMate.USB1 should be connected to pin 24 of the Zigbit module. In addition, the GND from the ioMate.USB1 has to be connected to pin 9 or 35 of the Zigbit module.
+The USB bus supply voltage VCC from the ioMate.USB1 should be connected to pin 24 of the Zigbit module and to VCC of the JTAG connector. In addition, the GND from the ioMate.USB1 has to be connected to pin 9 or 35 of the Zigbit module.
 For battery use, it might be reasonable that the VCC and Ground pins of the Zigbit module are routed out to Dual Line Pins, too. For switching between battery and Usb power a jumper should be soldered.
@@ Zeile 34: / Zeile 25: @@
 For future use, it may be useful to connect the TXD pin from the ioMate.USB1 with the RXD Pin 14 of the Zigbit module. Maybe we use Handshaking in future, so it is required, that RTS of one device connects to CTS of the other, and vice versa.
-**Pcb dimensons:**
+==== Reference documents: ====
+  *(1.)	Data sheet ioMate.USB1 http://lib.chipdip.ru/315/DOC000315066.pdf
+  *(2.)	Data sheet Zigbit module http://www.atmel.com/Images/doc8226.pdf
+  *(3.)	Data sheet Jtag MKII http://www.atmel.com/Images/doc2562.pdf
+==== Pcb dimensons: ====
   *The dimensons should not exceed 54mm height and 52mm width.
   *The direction of the USB-B plug of the ioMate.USB1 has to point to one of the height sides.
 Bsp.
-{{:contiki:draft4.png?direct&400|}}
+{{:contiki:draft5.png?direct&600|}}
+==== Sugesstions for Revision 2 - lessons learnt from first prototype ====
+  * include a power LED, maybe also a send/receive indication directly on the board
+  * Rx/Tx on the Zigbit Module are reversed!
+  * include a Reset-Button on the board
+  * use a small JTAG-Interface, just as on the ATMEL-Raven
+  * move the Battery/VCC jumper-switch out of the way (currently to close to the JTAG), needs to be accessible for re-programming
+  * Do we really need to route all the pins from the Zigbit/ioMate?  (Which ones are the most usefull/useless?)