Basic timers (TIM6 and TIM7) RM0033
484/1381 RM0033 Rev 9
16 Basic timers (TIM6 and TIM7)
This section applies to the whole STM32F20x and STM32F21x family, unless otherwise
specified.
16.1 TIM6 and TIM7 introduction
The basic timers TIM6 and TIM7 consist of a 16-bit auto-reload counter driven by a
programmable prescaler.
They may be used as generic timers for time-base generation but they are also specifically
used to drive the digital-to-analog converter (DAC). In fact, the timers are internally
connected to the DAC and are able to drive it through their trigger outputs.
The timers are completely independent, and do not share any resources.
16.2 TIM6 and TIM7 main features
Basic timer (TIM6 and TIM7) features include:
• 16-bit auto-reload upcounter
• 16-bit programmable prescaler used to divide (also “on the fly”) the counter clock
frequency by any factor between 1 and 65536
• Synchronization circuit to trigger the DAC
• Interrupt/DMA generation on the update event: counter overflow
Figure 182. Basic timer block diagram
U
Trigger
controller
Stop, Clear or up
TRGO
U
UI
Reset, Enable, Count,
event
Preload registers transferred
to active registers on U event according to control bit
interrupt & DMA output
to DAC
COUNTER
CK_PSC
CNT
CK_CNT
Controller
Internal clock (CK_INT)
TIMxCLK from RCC
±
Prescaler
PSC
Auto-reload Register
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