Hi,
I am using the C6747 starter kit and our board will have C6745. I have a couple concerns about the C674x architecture:
1. We chose the C674x for a low power battery operated medical device. The C6745 itself will run about 170mA base on the DSP clock rate plus the allocated peripherals. We are planning to store the application image on SPI flash and boot though SPI0. In this configuration, we will use SDRAM as on the starter kit. We looked at the operating current for the SDRAM. They are 180mA a piece (more than the DSP) and the starter kit has 2 of SDRAM. Obviously, the starter kit is not intended for the low power application. My question is do you have any recommendation for low power SDRAM? From a brief search, we have no success.
2. We looked at what is the option if we can get rid off the SDRAM. The second concern is the BIOS PSP program memory are huge (McASP: 31KB, I2C: 14.4KB, SPI: 17.6KB, UART: 12.6KB, GPIO: 4K, Audio interface: 3KB, AIC: 9KB)
.text 0 c0000000 0003e2c0
c0000000 00007620 edma3_rm_bios.lib : edma3resmgr.obj (.text)
c0007620 00003440 Uart.obj (.text)
c000aa60 000029a0 edma3_drv_bios_c674.lib : edma3_drv_basic.obj (.text)
c000d400 00002940 Aic31.obj (.text)
c000fd40 00002020 edma3_drv_bios_c674.lib : edma3_drv_adv.obj (.text)
I won't be able to fit into internal RAM.
It is not for criticizing purposes but I am curious how other low power battery operated devices can use this DSP with limitations on operating current and memory space? I would like to find out if you have any suggestion.
