TDA4VM: MMC interface does it support encryption

Hi Mohsen,

The TRM snippet did not come through, could you re-attach it?

Regards,
Vishal

here you go its in section 12.3.6.1.1

MMCSD1/MMCSD2 Host Controller (SD/SDIO interface):
Secure Digital Card Support:
– Backward compatible with earlier SD card specifications
– SD Host Controller Standard Specification 4.10 and SD Physical Layer Specification v3.01
– SDIO Specification v3.00
– Default Speed mode: 3.3 V signaling, frequency up to 25 MHz, up to 12.5 MBps
– High Speed mode: 3.3 V signaling, frequency up to 50 MHz, up to 25 MBps
– SDR12: UHS-I 1.8 V signaling, frequency up to 25 MHz, up to 12.5 MBps
– SDR25: UHS-I 1.8 V signaling, frequency up to 50 MHz, up to 25 MBps
– SDR50: UHS-I 1.8 V signaling, frequency up to 100 MHz, up to 50 MBps
– DDR50: UHS-I 1.8 V signaling, frequency up to 50 MHz, up to 50 MBps
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Peripherals

12.3.6.1.2 MMCSD Not Supported Features
MMCSD0 Host Controller:
• MultiMedia Card:
– 3.3 V, 3.0 V and 1.2 V
– Secure Digital Card and SDIO
– Muxing of other LVCMOS interfaces onto the MMCSD interface at the SoC level
– HS400 DDR:
• 1.8 V, 0-200 MHz, 8-bit bus width, 400 MBps
MMCSD1/MMCSD2 Host Controller:
• MultiMedia Card
• Secure Digital Card:
– UHS-II
– SDR104: UHS-I 1.8 V signaling, frequency up to 200 MHz, up to 100 MBps

Hi Mohsen,

Note the MMCSD host controller instance number in supported and unsupported sections.



Regards,
Vishal

Hi Vishal

thanks for pointing that out but still if you look at the not supported it says MMCSD1/MMCSD2 host controller does not support secure digital card but above it says that MMCSD1/MMCSD2 does support secure digital card? so which is true? or when it says don't support is just certain features? We might want to clarify exactly what we support and what we don't.

also does that mean we do support encryption on the MMC interface or that is something else? Can you also comment on this please.

Thanks

Hi Mohsen,

It is stating UHS-II SD cards are not supported and UHS-I cards are supported with exception of SDR104 speed mode.

ok great can you answer my 2nd questions also please below

also does that mean we do support encryption on the MMC interface or that is something else? Can you also comment on this please.

Thanks

I am not sure about this question, need to check and get back.
Haven't heard of encryption and MMC.

Mohsen,

Can you be specific about the features you are looking for?  I don't see encryption specifically called out in the spec.

Thanks & Regards,

Shiou Mei