Re: [avr-gcc-list] Homebrew ICE?

[Joerg Wunsch]

As Neil Johnson <address@hidden> wrote:

>> OTOH, they are certainly a lot more expensive than the 74HC stuff i'm
>> using currently, and people wanting to build their own might be faced
>> with problems getting these chips.

>You do know Maxim have a _very_ good view on free samples?

Yes, i know, and that would certainly be a nice solution for some
prototypes.  OTOH, i hesitate to make this the official policy, say
someone wants to produce 100 PCBs for it, and each of the hundred
potential customers will have to request their own samples...

>Also, when you consider the Maxim chip handles both directions, then it
>would do the work of two 74HC chips, which would take up more board space
>than this one Maxim chip.

Board space would not be much of a concern for me (it's small anyway),
and the bidirectional functionality is useless for the JTAG interface
(even sRST which is a bidirectional line needs two separate level
shifters).  I thought about using two unidirectional chips, one for
the signals going from ICE to target, one for the opposite direction.
-- 
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/