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PCB USB native

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sempre

Post subject: PCB USB native

Posted: October 6th, 2010, 11:20

Joined: October 14th, 2005, 9:26
Posts: 1060

Hi to all!

Please squem solder sata conector in pcb..
:mrgreen:

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HD HM501IX PCB B.jpg [ 64.36 KiB | Viewed 12115 times ]

HD HM501IX PCB Abb.jpg [ 72.44 KiB | Viewed 12115 times ]

HD HM501IX.jpg [ 106.04 KiB | Viewed 12115 times ]

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sempre

Post subject: Re: PCB USB native

Posted: October 7th, 2010, 14:08

Joined: October 14th, 2005, 9:26
Posts: 1060

sempre wrote:

Hi to all!

Please squem solder sata conector in pcb..
:mrgreen:

Where can I find the adapter? :?:

(usb-sata-pata) know in pc3k UDMA has ... to buy just the adapter

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dobrevjetser

Post subject: Re: PCB USB native

Posted: October 7th, 2010, 14:11

Joined: December 27th, 2006, 10:15
Posts: 1852
Location: Belgium

There is no such adapter. You have to do modifications yourself.

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fzabkar

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 5:39

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

The underside of the board has the USB-SATA bridge chip. The two long pairs of capacitively coupled tracks are the SATA Tx/Rx pairs.

If the chip is a JMicron JM20339, then see this reference design for pinouts:
http://www.hxwtek.com/upload/jm20329_st ... 20open.pdf

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sempre

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 15:11

Joined: October 14th, 2005, 9:26
Posts: 1060

fzabkar wrote:

Thanks for help!
Look chip.

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jm20339.jpg [ 16.12 KiB | Viewed 12018 times ]

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fzabkar

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 16:26

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

I guess you know what to do. However, for those that don't, you need to remove the four coupling capacitors, and run four individual wires from the MCU side of each capacitor to a SATA connector.

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sempre

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 16:41

Joined: October 14th, 2005, 9:26
Posts: 1060

Remove these capacitors?
Squem PCB?
:mrgreen:

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CAPACITORS SAMSUNG.jpg [ 33.38 KiB | Viewed 12011 times ]

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fzabkar

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 17:01

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

Sorry, the schematic was for a JM20329 which has a different pinout. However, the principle should be the same for the JM20339.

I have identified the capacitors here:
http://www.users.on.net/~fzabkar/HDD/JM20339_Tx_Rx.jpg

I believe the pins should be laid out in the same order (or reverse order) as the SATA connector:
http://pinouts.ru/HD/serialATA_pinout.shtml

In fact, here is a reference design for the JM20339:
http://www.wison.com.tw/cht/document/LT ... 9-V1.2.pdf

... and a datasheet:
http://www.wison.com.tw/cht/document/LT ... 061012.pdf

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sempre

Post subject: Re: PCB USB native

Posted: October 8th, 2010, 17:17

Joined: October 14th, 2005, 9:26
Posts: 1060

fzabkar wrote:

THANKS!!

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