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Bouffalo Lab BL702 - Clock Architecture

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BL702/704/706 Reference Manual
MCU
DIV
bclk
144MHz
120MHz
57.6MHz
96MHz
CG
DIV
hclk
SOC
fclk
f32k_clk
CG
PMU
1
1
1
0
DIV
uart clk
(~2MHz)
xclk
DIV CG i2c clk
DIV CG spi clk
DIV
CG
general adc clk
1
1
CG
pwm clk
0
RC32K
XTAL32K
DIV
CG
en11bit
f32k_sel
RC32M
clkpll_xtal_rc32m_sel
DLL
xtal_clk
root_clk_sel[0]
pll_en
bclk_en
bclk_div
hclk_en
hclk_div
root_clk_sel[1]
pll_sel
sel
sel
sel
3bit
6bit
16bit
8bit
5bit
en
en
en
en
en
pir
CG
CG
Cnt
XTAL
32MHz
96MHz
72MHz
DIV CG
ash clk
en3bit
sel
DIV CG
ir clk
6bit en
CG
gpdac clk
(~512KHz)
DIV
sel
en
duty
AUPLL
24.576MHz
32.768MHz
CG
i2s clk(~2MHz)
en
32MHz
DIV
sel
5bit
CG
CG
CG
en
en
en
/8
kys clk(1MHz)
qdec clk(1MHz)
kys clk(128KHz)
/2
usb clk
(duty 50/50)
en
CG
48MHz
1
duty
Fig. 2.2: Clock architecture
BL702/704/706 Reference Manual 28/ 375
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