Хост-контроллер SD / MMC (SMHC): список регистров

  DTO_LMT

Data Timeout Limit
This field can set time of the Host wait for the data from the Device.
Ensure to communicate with the Device, this field must be set to maximum that greater than the time NAC.
About the NAC, the explanation is as follows:
When Host read data,data transmission from the Device starts after the access time delay NAC beginning
from the end bit of the read command (ACMD51,CMD8,CMD17,CMD18).
When Host read multiple block (CMD18), a next blocks data transmission from the Device starts after the
access time delay NAC beginning from the end bit of the previous block.
When Host write data, the value is no effect.

  RTO_LMT

Response Timeout Limit

Команда U-Boot для чтения регистра

Bit fields structure

typedef union  smhc_tmout
{
  struct
  {
   unsigned rto_lmt : 8;
   unsigned dto_lmt : 24;
  } b;
   unsigned long w;
} SMHC_TMOUT