5.2.2 Oscillator Control Register (OSCC)
The OSCC register contains the oscillator enable and configuration bits.
Register Description: Oscillator Control Register
Register Name: OSCC
Register Address: Module 05h, Index 0Ch
Bits 15 to 12, 4, and 3: Reserved. Read 0, write ignored.
Bits 11 and 10: High-Frequency Crystal Output Capacitance Select 1 and 0 (HFOC1 and HFOC0). These bits select the output
capacitance of the on-chip high-frequency oscillator. The capacitor value is switched on to the XOUT pin of the MAXQ7665. The pos-
sible selections are given below. Note: For the default 00 setting, only a 1.3pF capacitor is switched on. The 6pF capacitor value is
essentially due to stray capacitance.
Note: For the MAXQ7666, the HFIC1:HFIC0 bits select both the input and output capacitance of the on-chip high-frequency oscillator.
The HFOC1:HFOC0 bits are used to select one of four possible crystal drive strengths as shown in the following table. Refer to the
MAXQ7666 data sheet for typical drive strengths.
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