Cypress FM4 Series - Present State Register

CHAPTER 15: SD Card Interface
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 853
2.9 Present State Register
The Host Driver can get status of the Host Controller from this 32-bit read-only register.
D31 D25
D24
D23 D20
D19
D18
D17
D16
Rsvd
CMD Line Signal Level
DAT[3:0] Line Signal Level
Write Protect Switch
Pin Level
Card Detect Pin Level
Card State Stable
Card Inserted
D15 D12
D11
D10
D09
D08
D07 D04
D03
D02
D01
D00
Rsvd
Buffer Read Enable
Buffer Write Enable
Read Transfer Active
Write Transfer Active
Rsvd
Re-Tuning Request
DAT Line Active
Command Inhibit (DAT)
Command Inhibit (CMD)
For details of this register, refer to SD Specifications Part A2.