[SI-LIST] Re: RDRAM termination
- From: "Dance Wu (netscape.net)" <wudance@xxxxxxxxxxxx>
- To: "Baranauskas, Dave" <Dave.Baranauskas@xxxxxxxxxxxx>
- Date: Thu, 28 Mar 2002 11:16:21 -0800
Thanks, folks.
Very clear explanation
Dan
Baranauskas, Dave wrote:
> Dan,
>
> To answer you question, Direct RDRAM IO is an open drain current source
> (I believe this is the case for Base and Concurrent RDRAM as well).
> This being the case the IO's current comes from the termination voltage
> source and is routed through the terminators connected to the end of the
> bus. If you do not put the termination resistors in circuit the IO can
> not switch.
>
> Dave
>
> -----Original Message-----
> From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
> Sent: Thursday, March 28, 2002 11:04 AM
> To: wudance@xxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: RDRAM termination
>
>
>
> Hi! My advice would be to talk to Rambus directly on
> your case because Rambus does not release any models
> of it I/O and hence an end user does not have any
> knowledge about how to go about designing the board
> except rely on them .
> Bob
> --- "Dance Wu (netscape.net)" <wudance@xxxxxxxxxxxx>
> wrote:
>
>>Hi,
>>
>>One of my projects requires RDRAM. I understand that
>>termination is
>>needed at the end of channel to eliminate/minimize
>>reflection. My
>>question is do I still need these termination
>>resistors if there is only
>>one RDRAM device ( not the module ) on the channel?
>>I'm trying to save
>>power and board space here. Your opinion and
>>experience are greatly
>>appreciated.
>>
>>Dan
>>
>>
>>
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>
>
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