STM32W108CBU61TR STMicroelectronics, STM32W108CBU61TR Datasheet - Page 115

• Manufacturer Part Number: STM32W108CBU61TR
• Description: 16/32-BITS MICROS
• Manufacturer: STMicroelectronics
• Series: STM32r

Specifications of STM32W108CBU61TR

• Applications: RF4CE, Remote Control
• Core Processor: ARM® Cortex-M3™
• Program Memory Type: FLASH (128 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

STM32W108CB, STM32W108HB
10.1.3
Clock selection
The counter clock can be provided by the following clock sources:
●
●
●
●
Internal clock source (CK_INT)
The internal clock is selected when the slave mode controller is disabled (TIM_SMS = 000 in
the TIMx_SMCR register). In this mode, the TIM_CEN, TIM_DIR (in the TIMx_CR1
register), and TIM_UG bits (in the TIMx_EGR register) are actual control bits and can be
changed only by software, except for TIM_UG, which remains cleared automatically. As
soon as the TIM_CEN bit is written to 1, the prescaler is clocked by the internal clock
CK_INT.
Figure 25
without prescaling.
Figure 25. Control circuit in Normal mode, internal clock divided by 1
External clock source mode 1
This mode is selected when TIM_SMS = 111 in the TIMx_SMCR register. The counter can
count at each rising or falling edge on a selected input.
Internal clock (PCLK)
External clock mode 1: external input pin (TIy)
External clock mode 2: external trigger input (ETR)
Internal trigger input (ITR0): using the other timer as prescaler. Refer to the
timer as prescaler for the other timer
shows the behavior of the control circuit and the up-counter in normal mode,
Doc ID 16252 Rev 8
for more details.
General-purpose timers
Using one
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