jz4725

Andrés Calderón andres.calderon at emqbit.com
Sat Aug 22 08:34:54 EDT 2009


On Sat, Aug 22, 2009 at 7:15 AM, Wolfgang Spraul
<wolfgang at qi-hardware.com>wrote:

> The Ben NanoNote is using Jz4720 not Jz4725.
> What is the best way to have 64 MB SDRAM with the Jz4720?
> The 4720 has a 16-bit data bus whereas the 4740 has 32 bit, I think
> it's because 4720 has COB instead of BGA, but like you said some
> competitive reasons might be behind this too. Positioning the 4720
> as low-cost and against some other chips.
> I don't know anything about 4725 or 4725b right now.
> Wolfgang


hi,

Can you show us the price of the jz47xx family in volume?

We can  benchmark the performance impact  of the data bus width soon (Jz4725
vs Jz4740).

-- Andrés


>
> On Sat, Aug 22, 2009 at 02:06:19PM +0200, W.G. van de Hulst wrote:
> > I thought the point of the jz4725 was to be a jz4740-SX (16-bit
> > instead of 32-bit databus) to eliminate one RAM chip and to use LQFP
> > instead of BGA, both measures meant to lower cost and to compete with
> > comparable Rockchip 2706 designs.
> >
> > It seems strange to add it back, but of course there's now the new
> > jz4725b that allows booting from SD, so you can sacrifice the flash
> > chip to avoid requiring more space.
> >
>

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