Notes On Main Cr Clock Trimming - Fujitsu 8FX Hardware Manual

MB95630H Series
27.4

Notes on Main CR Clock Trimming

This section provides notes on main CR clock trimming.
After a hardware reset, the 10-bit main CR clock trimming value and the 5-bit temperature
dependent adjustment value will be loaded from the NVR Flash area to registers in the NVR
I/O area.
Table 27.4-1 shows the step size of main CR clock trimming.
Table 27.4-1 Step Size of Main CR Clock Trimming
Function
To achieve the minimum frequency
To achieve the maximum frequency
Step Size
MN702-00009-2v0-E
CHAPTER 27 NON-VOLATILE REGISTER (NVR) INTERFACE
Coarse trimming value
CRTH[4:0]
0b11111
0b00000
220 kHz to 300 kHz
FUJITSU SEMICONDUCTOR LIMITED
27.4 Notes on Main CR Clock Trimming
Fine trimming value
CRTL[4:0]
0b11111
0b00000
14 kHz to 20 kHz
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