ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
141
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
1
0
CLK_PLLCTL[19]
HIRC
48 / 49.152
MHz
HXT
4~24.576
MHz
PLL FOUT
111
011
010
001
HXT
LXT
HXT
HCLK
HIRC
000
1/2
1/2
1/2
CLK_CLKSEL0[5:3]
1
0
SysTick
RTC
WDT
CPU
LXT
32.768
kHz
LIRC
10
kHz
011
010
001
PLLFOUT
LXT
HXT
LIRC
000
CLK_CLKSEL0[2:0]
SYST_CTRL[2]
CPUCLK
1/(1)
LIRC
LIRC
11
10
CLK_CLKSEL1[1:0]
HCLK
1/2048
HIRC
HXT
01
LXT
111
HIRC
1
0
LXT
CLK_CLKSEL3[8]
EADC
1/(1)
PCLK1
WWDT
11
10
CLK_CLKSEL1[31:30]
HCLK
1/2048
/1,/2,/4,/8,/16
CRC
PCLK0
PLLFOUT
LIRC
CLK_CLKSEL1[29:28]
HCLK
HXT
HIRC
LXT
11
10
01
00
/2
(CLK_CLKOCTL[3:0]+1)
CLKO
0
1
DIV1EN
(CLK_CLKOCTL[5])
0
1
CLK1HZEN
(CLK_CLKOCTL[6])
1 Hz clock from RTC
LXT
LIRC
RTCSEL(CLK_CLKSEL3[8])
/10000
CLK_CLKSEL2[3:2]
CLK_CLKSEL2[7:6]
PCLK0
HXT
HIRC
PLLFOUT
11
10
01
00
1/(SPI0_CLKDIV[8:0]+1)
1/(SPI2_CLKDIV[8:0]+1)
SPI0
SPI2
CLK_CLKSEL2[5:4]
PCLK1
HXT
HIRC
PLLFOUT
11
10
01
00
1/(SPI1_CLKDIV[8:0]+1)
SPI1
PWM 0
1
0
PLLFOUT
PCLK0
CLK_CLKSEL2[0]
I2S
PCLK0
HXT
HIRC
PLLFOUT
CLK_CLKSEL3[17:16]
11
10
01
00
111
010
001
000
PCLK0
LXT
HXT
HIRC
CLK_CLKSEL1 [10:8]
CLK_CLKSEL1[14:12]
101
LIRC
011
TM0/TM1
TMR0
TMR1
111
010
001
000
PCLK1
LXT
HXT
HIRC
101
LIRC
011
TM2/TM3
TMR2
TMR3
CLK_CLKSEL1 [18:16]
CLK_CLKSEL1[22:20]
HCLK
PCLK1
/1,/2,/4,/8,/16
UART0
LXT
HXT
HIRC
PLLFOUT
CLK_CLKSEL1[25:24]
11
10
01
00
PWM0
EADC
I2C0
SPI0
SPI2
TMR0
TMR1
I2C1
RTC
SPI1
TMR2
TMR3
FMC
PDMA
SRAM
I2S
DPWM
1
0
/32768
CLK_CLKSEL2[11:10]
PCLK1
HXT
HIRC
PLLFOUT
11
10
01
00
DMIC
USB1.1 Device
Controller
USB1.1 PHY
/( 1)
/4
48MHz
1/(U1)
CLK_CLKSEL2[13:12]
PCLK0
HXT
HIRC
PLLFOUT
11
10
01
00
DPWM
DMIC
PLLFOUT
1
0
HIRC
CLK_CLKSEL4[24]
Figure 6.3-1 Clock Generator Global View Diagram