Basic timers (TIM6 and TIM7) RM0090
696/1749 RM0090 Rev 18
20 Basic timers (TIM6 and TIM7)
This section applies to the whole STM32F4xx family, unless otherwise specified.
20.1 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.
20.2 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 203. 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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