Registers
| NAME | PHYSICAL ADDRESS | WIDTH | 
| REG_CTRCARDCNT | 0x10004000 | 4 | 
| REG_CTRCARDSECCNT | 0x10004008 | 4 | 
| REG_CTRCARDSECSEED | 0x10004010 | 4 | 
| REG_CTRCARDCMD | 0x10004020 | 16 | 
| REG_CTRCARDFIFO | 0x10004030 | 4 | 
REG_CTRCARDCNT
| BIT | DESCRIPTION | 
| 28 | Reset (Read-only 1=High, 0=Low) | 
| 29 | Transfer mode (1=Write, 0=Read) | 
| 30 | Interrupt enable (1=Enable, 0=Disable) | 
| 31 | Start (1=Busy, 0=Idle) | 
REG_CTRCARDCMD
Specifies the 16-byte command to send. The command is split into 32-bit words, and stored as least significant word first, with each word itself in big-endian format.