STM32W108C8U63TR STMicroelectronics, STM32W108C8U63TR Datasheet - Page 38
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STM32W108C8U63TR
Manufacturer Part Number
STM32W108C8U63TR
Description
16/32-BITS MICROS
Manufacturer
STMicroelectronics
Series
STM32r
Datasheet
1.STM32W108C8U63TR.pdf
(207 pages)
Specifications of STM32W108C8U63TR
Applications
RF4CE, Remote Control
Core Processor
ARM® Cortex-M3™
Program Memory Type
FLASH (64 kB)
Controller Series
STM32W
Ram Size
8K x 8
Interface
I²C, SPI, UART/USART
Number Of I /o
24
Voltage - Supply
1.18 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-VFQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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6.3.1
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Figure 5
shows all the clock sources and the general areas of the chip to which they are routed.
Figure 5.
High-frequency internal RC oscillator (OSCHF)
The high-frequency RC oscillator (OSCHF) is used as the default system clock source when
power is applied to the core domain. The nominal frequency coming out of reset is 12 MHz.
Most peripherals, excluding the radio peripheral, are fully functional using the OSCHF clock
source. Application software must be aware that peripherals are clocked at different speeds
depending on whether OSCHF or OSC24M is being used. Since the frequency step of
OSCHF is 0.5 MHz and the high-frequency crystal oscillator is used for calibration, the
digital in
32kHz
12MHz
24MHz
XTAL
RC
Sleep Timer
Watchdog
counter
TIMx_SMCR[2:0]
counter
counter
TIMx
shows a block diagram of the clocks in the STM32W108C8. This simplified view
10kHz
32kHz
XTAL
RC
Clocks block diagram
OSCRC
OSC24M_CTRL[1]
TIMx_OR[1:0]
oscillator
OSC24M_CTRL[0]
(selects RC when
Failover monitor
SLEEPTMR _CFG[7:4]
SLEEPTMR _CLKEN[0]
XTAL fails )
(nominal 10)
/(2^N)
oscillator
/N
Doc ID 018587 Rev 1
OSC 24M
OSCHF
SLEEPTMR _CFG[0]
OSC32K
CLK1K
TIMxCLK
digital in
SCLK
/2
PCLK
CPU_CLKSEL[0]
DEBUG_EMCR[24]
FCLK
MAC Timer
AND
RATEGEN
counter
SCx
/2
Produces 6MHz
ADC_CFG[2]
or 1MHz
STM32W108C8
RAM CTRL
ST _CSR[2]
FLITF
SysTick
counter
CPU
SigmaDelta
bus
bus
TRACECLK
ADC
SCxSCLK
digital out
digital i /o
Flash
RAM
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