Cypress FM4 Series - Tuning Status Register

CHAPTER 15: SD Card Interface
894 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
2.38 Tuning Status Register
This register indicates the reference phase selected and re-tuning results.
D31 D24
D23 D16
Rsvd
Present Tuning point
D15 D11
D10 D08
D07 D00
Rsvd
3 Phase Re-Tuning
Result
8 Phase Tuning/Re-Tuning Result
*: This Family does not support tuning or re-tuning.
Bit
Attribute
Description
31-24
Rsvd
Reserved
23-16
ROC
Present Tuning point
These bits indicate the reference phase currently selected.
They are updated after tuning/re-tuning has been completed.
If the phase is changed through software, these bits are updated after the new phase has
been set in the Tuning Point Select bits in the Tuning Setting Register.
0b00000001: The zeroth phase has been selected.
0b00000010: The first phase has been selected.
0b00000100: The second phase has been selected.
0b00001000: The third phase has been selected.
0b00010000: The fourth phase has been selected.
0b00100000: The fifth phase has been selected.
0b01000000: The sixth phase has been selected.
0b10000000: The seventh phase has been selected.
Set/Reset
Condition
Set
---
Reset (0)
System reset
Software Reset For All
Writing 0 to the Sampling Clock Select bit
15-11
Rsvd
Reserved