STM32W108CZ STMicroelectronics, STM32W108CZ Datasheet - Page 136
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STM32W108CZ
Manufacturer Part Number
STM32W108CZ
Description
High-performance, IEEE 802.15.4 wireless system-on-chip with embedded Flash memory
Manufacturer
STMicroelectronics
Datasheet
1.STM32W108CC.pdf
(232 pages)
Specifications of STM32W108CZ
Receive Current (w/ Cpu)
27 mA
Transmit Current (w/ Cpu, +3 Dbm Tx)
31 mA
Low Deep Sleep Current, With Retained Ram And Gpio
400 nA/800 nA with/without sleep timer
Standard Arm Debug Capabilities
Flash patch & breakpoint; data watchpoint & trace; instrumentation trace macrocell
Single Voltage Operation
2.1-3.6 V with internal 1.8 V and 1.25 V regulators
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General-purpose timers
10.1.10
136/232
Hints on using center-aligned mode:
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●
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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:
●
●
When starting in center-aligned mode, the current up-down configuration is used. This
means that the counter counts up or down depending on the value written in the
TIM_DIR bit in the TIMx_CR1 register. The TIM_DIR and TIM_CMS bits must not be
changed at the same time by the software.
Writing to the counter while running in center-aligned mode is not recommended as it
can lead to unexpected results. In particular:
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 STM32W108CZ
Doc ID 16252 Rev 13
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