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Serial port (4 pin connector) and JTAG connector (20 pin) for unbricking

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HWguru

NAS2000-Team

Posts: 1,039

Location: Wien

1

Monday, March 22nd 2010, 11:40pm

Serial port (4 pin connector) and JTAG connector (20 pin) for unbricking

There are two connectors on the board which are needed for unbricking.

1. The serial port - is used for access to the bootloader.
An adapter with 3.3V voltage (mostly called 3.3V TTL) levels is needed. It can be either USB/TTL or Serial/TTL. :!: Never connect a PC's serial port directly to the NAS!
Connect Rx of the NAS with Tx of the adapter and vice versa.

2. The JTAG connector - is needed if the bootloader has been erased or overwritten and does not respond any more
A special adapter JTAG adapter is needed. Either an adapter for the LPT port or an FTDI FT232R chip based one for the USB port may be used.
A description can be found at the wiki This is a description for the Raidsonic NAS2000 but it should be the same for the MVIXBox.

At the openGemini Wiki there is a very good description of the bootloader and the boot process.
The bootloader can also be found for download there.

Serial Port - [attach]230[/attach] JTAG Port - [attach]231[/attach]

HWguru
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NAS2000 2.3.2.IB.2.RS.1+Lüfterabschaltung+SSH+do_it+zusätzliche commandline tools+changed root password
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