==== DNS-300 internal photos ====

|{{full.jpg?200 |Full DNS-300 internal view}}|{{cpu_jtag.jpg?200 |CPU and JTAG connector}}|
|{{flash.jpg?200|Intel Flash and Serial connector}}|{{hdd_power.jpg?200|HDD power connector and others}}|
|{{ram_usb.jpg?200|RAM and USB chips}}|

==== Serial connector ====
DNS-300 has soldered 5 pin COM-TTL connector (JP1) like DSL-G604T. To use it with PC you need a RS-232 <-> TTL adapter.\\
I've used schema from McMCC site: http://mcmcc.bat.ru/dlinkt/data-cable/scheme.jpg\\
{{mcmcc_serial_scheme.jpg?200|Local copy}}
{{dns-300_serial_connector.jpg?200|Serial Connector}}\\
<note important> I've disconnected pin 1 from RS-232 on this scheme to use it under WinXP HyperTerminal.</note>
Also you can use USB to serial cable described here: [[:howto:use USB with Serial Console]]

**Serial settings:** 19200, 8 bit, no parity, no hardware sync.

==== JTAG ====
It seems DNS-300 has unsoldered 20 pin JTAG (JP6) on board.
Info about this JTAG connector can be found here: http://hri.sourceforge.net/tools/jtag_faq_org.html#_Toc63218717
<note important>JTAG on DNS-300 has incorrect pins numbers than in JTAG FAQ</note>

==== Hardware documentation links ====
| CPU | SL3316 | http://www.storlinksemi.com/products-sl3316.htm |
| Flash | TE28F640 | |
| GPIO Extender | PCA9555 | http://www.semiconductors.philips.com/pip/PCA9555.html |
| EMAC->PHY conv| AC101LKQT | http://pdf1.alldatasheet.com/datasheet-pdf/view/80500/ETC/AC101L.html | {{AC101L.pdf|local copy}} |
| Power Controller | RT9206 | http://www.richtek.com/www/Docs/DS9206-09.pdf |
| DDR RAM (256M x 16)| nt5ds16m16cs | http://www.nanya.com/attach_file/NTC-256M-C-DDR.pdf |