APPOTECH CW6632B - Page 39

4 Reset Generation 33
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
IISREFCSEL: IIS Reference clock source select
00 = Select system clock
01 = Select XOSC12M
10 = Select PLL2
11 = Select PLL2 div2
IISBCSEL: IIS BCLK generate clock source select
00 = Select system clock
01 = Select external 12MHz crystal oscillator
01 = Select PLL2
11 = Select PLL2 div2
iis_clk
xosc_tclk
clk49m
pll2_d2
00
01
10
11
MUX
iis_bclk
CLKCON2[5:4]
iis_clk
xosc_tclk
clk49m
pll2_d2
00
01
10
11
MUX
iis_refclk
CLKCON2[7:6]
Figure 4-5 IIS clock select figure
TSCLK_OUT_SEL: RC or PLL clock output select
0 = RC clock output
1 = 26MHz XOSC from BT
IR32K_SEL: IR digital model work at 32K clock
0 = Work at 1M clock
1 = Work at 32K clock
IR_CLK_SEL: ir_clk sel divide select
00 = 1MHz PLL
01 = 1MHz RC
10 = External 32 KHz or 12MHz crystal oscillator controlled by CLKCON2 [6] and CLKCON2 [7] as shown in XFigure
4-3