[Arm-netbook] Handheld Games Console

[Luke Kenneth Casson Leighton]

On Wed, Sep 23, 2015 at 4:07 PM, GaCuest <gacuest at gmail.com> wrote:
> En 23 de septiembre de 2015 en 16:55:18, Luke Kenneth Casson Leighton (lkcl at lkcl.net) escrito:
>> On Wed, Sep 23, 2015 at 2:59 PM, GaCuest wrote:
>>
>> > I’m using AirMail. It has plain text editing, but not line-wrap.
>> > I will do that manually.
>>
>> appreciated.
>>
>> > I updated the block diagram:
>> > http://rhombus-tech.net/community_ideas/games_console/news/pcb_block_diagram_updated2_23sep2015/
>> >
>> > Anything more to change?
>>
>> yes, one thing that's important: 1st USB is mandated to be >= speed
>> than 2nd USB. so you need to swap 1st USB with 2nd USB.
>>
>> reason: the STM32F is connected to the port that may end up being
>> 480mbit/sec and the USB Hub is connected to the port that may end up
>> being only 11mbit/sec.
>>
>> certainly, for the jz4775 CPU Card (which i am sending off very
>> shortly), it *DEFINITELY* has USB 2.0 for the 1st port and *ONLY* USB
>> 1.1 for the 2nd.
>>
>> and i am certainly not going to increase the cost of the jz4775 CPU
>> Card by an extra $2 worth of components to put in a USB2 Hub when the
>> SOC itself is only $2.50!!!
>>
>
> I think that you have not properly seen the block diagram.

 wiggle wiggle follow the lines with my finger pointing at the screen
this time... :)

> The STM32 is connected to the second USB, the USB HUB is connected
> to the first USB.
>
> This right?

 yes! :)