[Arm-netbook] a10 module and jtag?

[lkcl luke]

On Mon, Dec 26, 2011 at 4:43 AM, Tom Cubie <tangliang at allwinnertech.com> wrote:
> On 12/24/2011 11:37 AM, lkcl luke wrote:
>> 2011/12/24 Henrik Nordström<henrik at henriknordstrom.net>:
>>> lör 2011-12-24 klockan 02:16 +0000 skrev lkcl luke:
>>>> 2011/12/23 Henrik Nordström<henrik at henriknordstrom.net>:
>>>>> fre 2011-12-23 klockan 21:02 +0000 skrev lkcl luke:
>>>>>> so, interestingly, it looks like there are 2 JTAG ports!
>>>>> Any idea what they are used for?
>>>>   *lol* no?
>>> Sorry, bad wording. Any idea why there is two jtag interfaces? What do
>>> each JTAG interface connect to?
>>>
>>> One quite likely goes to the Cortex A8, but the other?
>>   sorry, henrik - still no idea!  there's absolutely nothing in the
>> documentation.
>>
>>   l.
>>
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>
> The other jtag interface is for product debugging. If a product need to
> use jtag to debug, just need to change the sys_config file and set the
> jtag pin to sdcard pin(the same applied for uart0), then with a special
> sdio interface debug board we can debug the product, no disassembling
> needed.

 very cool design.

 which one is that?  ok i have the datasheet... SPI2 <-> JTAG0 ok must
make a note of that...