Cypress FM4 Series - Page 123

CHAPTER 2-3: High-Speed CR Trimming
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 123
Procedure Example of Using CR Trimming Area Storage Data inside Flash Memory
Figure 4-6 shows a procedure example of reading trimming data stored in the CR trimming area inside
the flash memory and setting it in the High-speed CR oscillation Frequency Trimming Register.
Figure 4-6 Procedure Example of Using CR Trimming Area Storage Data
Note:
− For the address of the CR trimming area, see Flash Programming Manual for the product used.
* Write a value other than
0x1ACC_E554
Start
Unlock the register
MCR_RL_.TRMLCK[31:0]=0x1ACC_E554
Set the read temperature
Trimming data (TTRM) to MCR_TTRT.TRT
Read the CR trimming area
inside flash memory
Set the read frequency trimming
Data (TTRM) to MCR_FTRM.TRD
Lock the register
MCR_RLR.TRMLCK[31:0]=0x0000_0000
End