CMOSTEK CMT2189C, User Manualline

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4.1.15 SOSCPR
（
Addr:0x1C/0x1D
）
Table 4-26. SOSCPRL Register
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
SOSCPRL SOSCPR<7:0>
Reset 0xFF
Type RW
Table 4-27. SOSCPRH Register
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
SOSCPRH - SOSCPR<11:8>
Reset - 1111
Type - RW
Table 4-28. SOSCPR Function Description
4.1.16 OPTION
（
Addr:0x81
）
Table 4-29. OPTION Register
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
OPTION /PAPU INTEDG T0CS T0SE PSA PS<2:0>
Reset 1 1 1 1 1 111
Type RW RW RW RW RW RW
Table 4-30. OPTION Bit Function Description
2 CKMAVG
Measurement average mode of fast clock measuring slowclock period
1 = Open the average mode.(Automatically measure and accumulate four times)
0 = Close the average mode.
1 CKCNTI
Fast clock measuring slowclock period Enable bit
1 = Enable fast clock measuring slowclock period.
0 = Disable fast clock measuring slowclock period.
Note: The bit will automatically return to zero after the measurement is completed.
0 - Reserved-bit, can not be written as 1.
Bit Name Function
11:
0
SOSCPR<11:
0>
Low-frequency oscillator period (unit: fast clock period number) is used for slow clock
measurement.
Bit Name Function