APPOTECH CW6632B, Руководство пользователя

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4 Reset Generation 37
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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10 = 32K XOSC
11 = 32K XOSC
Register 4-16 PLL2INTH
– PLL2 integer high
Position 7 6 5 4 3 2 1 0
Name PLL2INT[11:8]
Default 0 0 0 0 1 0 1 1
Access R/W R/W R/W R/W R/W R/W R/W R/W
Register 4-17 PLL2INTL
– PLL2 integer low
Position 7 6 5 4 3 2 1 0
Name PLL2INT[7:0]
Default 1 0 1 0 1 0 0 0
Access R/W R/W R/W R/W R/W R/W R/W R/W
PLL2INT = int(98.304MHz/pll2_refclock)
Register 4-18 PLL2FRACH
– PLL2 fraction high
Position 7 6 5 4 3 2 1 0
Name FRACH
Default 0 0 0 0 0 0 0 0
Access R/W R/W R/W R/W R/W R/W R/W R/W
Register 4-19 PLL2FRACL
– PLL2 fraction low
Position 7 6 5 4 3 2 1 0
Name FRACL
Default 0 0 0 0 0 0 0 0
Access R/W R/W R/W R/W R/W R/W R/W R/W
When the fraction is less than 0.25, set FOVER=1, and fraction = (f1)/2, integer = (integer-1)
When the fraction is more than 0.80, set FOVER=1, and fraction = fraction/2, integer = integer
FRAC = fraction*65535
User guide:
1. PLL1 frequency division
PLL1 input reference clock is f0 (from RC or OSC), its internal dividing clock is 60M, frequency dividing ratio is
60M/f0.
Clock divide ratio consist of integer and decimal, the default value of integer part is 1831(default reference clock
is 32.768k), the default value of decimal part is 0(only integral frequency division this time).
If f0=32.768k, frequency dividing ratio is 1831, decimal fraction part set 0.
If f0=12M, frequency dividing ratio is 5, decimal fraction part set 0.
If f0=4M, frequency dividing ratio is 15, decimal fraction part set 0.
2. If frequency dividing ratio is 58.a, then integer set 58, decimal fraction is a*65535.