enCoRe™ V CY7C643xx, enCoRe™ V LV CY7C604xx TRM, Document No. 001-32519 Rev *H
233
1,E8h
21.4.21 IMO_TR
Internal Main Oscillator Trim Register
This register is used to manually center the Internal Main Oscillator’s (IMO) output to a target frequency.
It is strongly recommended that you do not alter this register’s values except to load factory trim settings when
changing IMO range.
When changing ranges, the new trim value for this range must be read from flash using a Table Read operation. The new
value must be written at the lower frequency range. That is, when moving to a higher frequency range, change the IMO_TR
value and then change the range (SLIMO[1:0] in CPU_SCR1). When moving to a lower frequency, change the range first and
then update IMO_TR.
For additional information, refer to the
Register Definitions on page 68
in the Internal Main Oscillator chapter.
7:0
Trim[7:0]
The value of this register is used to trim the Internal Main Oscillator. Its value is set to the best value
for the device during boot.
Individual Register Names and Addresses:
1,E8h
IMO_TR : 1,E8h
7
6
5
4
3
2
1
0
Access : POR
RW : 00
Bit Name
Trim[7:0]
Bit
Name
Description
