Hello!
Your design sounds a little bit strange to me.
The ROM (I guess you mean the flash), cannot be shared by both CPUs.
And the RAM either. So if your application needs 25k RAM, it's fine, but
the fact that you have another CPU (let's call it CPU2) does not mean that
you can access CPU2's RAM from CPU1.
And about the flash memory, why not using an external flash, for instance
an AT45 (from Atmel) ?
Then if you really need 25 k RAM why not using a CPU that has 25 k?
I would try to look at ARM processors. Many of them have more than 25 k
memory, and some of them have a fair amount of internal flash.
The processing power is higher. One device will be sufficient to drive
your QVGA LCD and do other tasks.
And the whole system will be cheaper, less complex, more reliable.
Dora.
london said:
Hi
Any none have experience to work with dual MSP430F5438. Each micro have to talk with each other. For my application I need 25K RAM & >300K ROM. So I decided to use two MSP430F5438. One for drive QVGA LCD and other one for all applications. How to communicate each MCUs.
Thanks