HI Chmaps,
We have some doubts regarding AM1705 below points, please provide the information AS AP.
AM1705 supports SD card 4-bit or not?
Am1705 USB support for device mode or host mode, we require device mode.
Thanks & Regards,
Feroz
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HI Chmaps,
We have some doubts regarding AM1705 below points, please provide the information AS AP.
AM1705 supports SD card 4-bit or not?
Am1705 USB support for device mode or host mode, we require device mode.
Thanks & Regards,
Feroz
Hello Feroz,
You can Interface SD Card using MMC / SD Controller with 4-bit Mode.
USB controller requires the use of an external charge pump capable of sourcing 5V power. A USB_DRVVBUS is used as a control signal to enable/disable
the external logic to either source or disable power on the VBUS line.For mixed host/device mode of operation, tie this to the external charge pump is needed.
Regards
Abhijit Das
Hi Abhijit,
is there a way we can dtermine this from the data sheet ? what features/versions do we need to map to determine the SD Card support?
About USB, do we do support the USB device mode isn't it? It needs the changes as suggested by you.
Why does the data sheet mention USB Client? Why can we not put USB device to be more clear and unambiguous in the data sheet.?
Thanks!
Best Regards
Feroz
Hi Feroz,
Please download Technical Reference Manual (TRM) from http://www.ti.com/product/am1705
or http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=spruh93&fileType=pdf.
1. a) Under TRM you can get the details common interface of SD card 24-2. MMC/SD Controller Interface Diagram under SD card
b) Figure 24-3. helps you to 4 bit interface MMC Configuration and SD Configuration Diagram with SD/ MMC card Controller
2 USB Device you go Universal Serial Bus 2.0 (USB) Controller main page no 1206 -1207.
Regards
Abhijit