Cypress FM4 Series - High-Speed CR Oscillation Temperature Trimming Setup Register (MCR_TTRM)

CHAPTER 2-3: High-Speed CR Trimming
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 127
5.3 High-speed CR Oscillation Temperature Trimming Setup Register
(MCR_TTRM)
The MCR_TTRM register sets the temperature trimming value.
Register Configuration
bit
31
16
Field
Reserved
Attribute
-
Initial value
-
bit
15
5
4
3
2
1
0
Field
Reserved
TRT[4:0]
Attribute
-
R/W
Initial value
-
10000
Register functions
[bit31:5] Reserved : Reserved bits
"0" is always read from these bits.
These bits have no effect when written.
[bit4:0] TRT[4:0] : Temperature trimming setup bits
bit4:0
Description
When write
These bits make adjustment to the high-speed CR oscillator frequency.
Write the value read from Temperature Trimming bit storage area in Flash Memory.
For Temperature Trimming bit storage area, see “FLASH PROGRAMING MANULA” of the
product used.
When read
A specified value is read.
As an initial value, 0b10000 is read.
Notes:
− This register is not initialized by software reset.
− Before obtaining the frequency trimming data, be sure to set this register.