SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 19
Version 1.1
1.3 CLOCK GENERATION BLOCK DIAGRAM
CLKOUT
PLL
IHRC
12MHz
ILRC
32KHz
IHRC
ILRC
PLLCLKout
SYSCLKSEL
CLKOUTSEL
WDT
Clock Prescaler
/1, 2, 4, 8, 16, 32
WDT_PCLK
SPIn_PCLK
HCLK
AHB clock for SPIn
SPInCLKEN
n=0, 1
WDT
register block
WDT
clock source
SPIn
register block
SPIn
clock source
AHB clock for WDT
AHB clock for AHB to APB bridge, to AHB
matrix, to Cortex-M0 FCLK, HCLK, and
System Timer, to SYS, and to PMU
AHB clock for GPIO
LXTALOUT
LXTALIN
Low speed
Crystal
oscillator
32.768KHz
32.768KHz
GPIO block
PLLCLKout
RTCCLKSEL
ILRC
32.768KHz
ADC
Clock Prescaler
/1,2,4,8,16
ADC_PCLK
AHB clock for ADC
ADCCLKEN
ADC
register block
ADC
clock source
I2Sn
Clock Prescaler
/1,2, 3, 4,8,16
I2Sn_PCLK
AHB clock for I2Sn
I2SnCLKEN
n=0,1
I2Sn
register block
I2Sn
clock source
I2Cn_PCLK
AHB clock for I2Cn
I2CnCLKEN
n=0,1
I2Cn
register block
I2Cn
clock source
UARTn_PCLK
AHB clock for UARTn
UARTnCLKEN
n=0,1,2,3
UARTn
register block
UARTn
clock source
AHB clock for SRAM
SRAM block
AHB clock for FLASH
FLASH block
Max 16MHz
CLKOUT
Prescaler
/1,2,4,
…
,128
WDTCLKEN
HCLK
IHRC
ILRC
32.768KHz
RTC_PCLK
RTC
register block
RTC
clock source
AHB clock for RTC
RTCCLKEN
LCDCLK
ILRC
32.768KHz
LCD_PCLK
LCD
register block
LCD
clock source
AHB clock for LCD
LCDCLKEN
PFPA blcok
AHB clock for PFPA
CMP_PCLK
AHB clock for CMP
CMP
register block
CMP
clock source
CMPCLKEN
OPA_PCLK
AHB clock for OPA
OPA
register block
OPA
clock source
OPACLKEN
EBI_PCLK
AHB clock for EBI
EBI
register block
EBI
clock source
EBICLKEN
CT16Bn_PCLK
AHB clock for CT16Bn
CT16BnCLKEN
n=5
CT16Bn
register block
CT16Bn
clock source
CT16BnCLKSEL
n=5
SYSCLK
AHB Prescaler
/1,2,4,
…
,128
HCLK
AHBCP
SYS
Prescaler
/1 or /1.5
DIV1P5
PLL_VCO
CT16Bn_PCLK
AHB clock for CT16Bn
CT16BnCLKEN
n=0,1,2,3,4
CT16Bn
register block
CT16Bn
clock source
CT16BnCLKSEL
n=0,1,2,3,4
PLL_VCO
32.768KHz
CRC_PCLK
AHB clock for CRC
CRC
register block
CRC
clock source
CRCCLKEN
HXTALOUT
HXTALIN
HXTAL
1MHz~25MHz
EHS Oscillator
PLLCLKSEL
PLL_VCO
USB SIE
USB
clock source
USB
register block
USBCLKEN
AHB clock for USB
USB_PCLK = 48MHz
48MHz if USB is enabled
Содержание SN32F280 Series
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