STM32W108HBU61TR STMicroelectronics, STM32W108HBU61TR Datasheet - Page 132

• Manufacturer Part Number: STM32W108HBU61TR
• Description: 16/32-BITS MICROS
• Manufacturer: STMicroelectronics
• Series: STM32r

Specifications of STM32W108HBU61TR

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Applications: IEEE 802.15.4 Wireless
• Processing Unit: Microprocessor
• Operating Supply Voltage (min): 1.18V
• Operating Supply Voltage (typ): 1.25V
• Operating Supply Voltage (max): 1.32V
• Package Type: VFQFPN EP
• Pin Count: 40
• Mounting: Surface Mount
• Rad Hardened: No
• 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: 18
• Voltage - Supply: 1.18 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-VFQFN Exposed Pad
• Lead Free Status / Rohs Status: Compliant

General-purpose timers
10.1.10
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One-pulse mode
One-pulse mode (OPM) is a special case of the previous modes. It allows the counter to be
started in response to a stimulus and to generate a pulse with a programmable length after
a programmable delay.
Starting the counter can be controlled through the slave mode controller. Generating the
waveform can be done in output compare mode or PWM mode. Select OPM by setting the
TIM_OPM bit in the TIMx_CR1 register. This makes the counter stop automatically at the
next update event.
A pulse can be correctly generated only if the compare value is different from the counter
initial value. Before starting (when the timer is waiting for the trigger), the configuration must
be:
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Figure 38. Example of one pulse mode
The direction is not updated the value written to the counter that is greater than the
auto-reload value (TIMx_CNT > TIMx_ARR). For example, if the counter was counting
up, it continues to count up.
The direction is updated if when 0 or the TIMx_ARR value is written to the counter, but
no update event is generated.
The safest way to use center-aligned mode is to generate an update by software
(setting the TIM_UG bit in the TIMx_EGR register) just before starting the counter, and
not to write the counter while it is running.
In up-counting: TIMx_CNT < TIMx_CCRy ≤ TIMx_ARR (in particular, 0 < TIMx_CCRy),
In down-counting: TIMx_CNT > TIMx_CCRy.
STM32W108HB, STM32W108CC, STM32W108CB and STM32W108CZ
Doc ID 16252 Rev 9