RM0313 Datasheet, PDF (450/900 Pages) STMicroelectronics – This reference manual targets application developers

General-purpose timers (TIM15/16/17)
RM0313
18.5.9 TIM15 counter (TIM15_CNT)
Address offset: 0x24
Reset value: 0x0000
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Bits 15:0
CNT[15:0]: Counter value
18.5.10 TIM15 prescaler (TIM15_PSC)
Address offset: 0x28
Reset value: 0x0000
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Bits 15:0 PSC[15:0]: Prescaler value
The counter clock frequency (CK_CNT) is equal to f_{CK_PSC} / (PSC[15:0] + 1).
PSC contains the value to be loaded in the active prescaler register at each update event
(including when the counter is cleared through UG bit of TIMx_EGR register or through trigger
controller when configured in “reset mode”).
18.5.11 TIM15 auto-reload register (TIM15_ARR)
Address offset: 0x2C
Reset value: 0x0000
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Bits 15:0 ARR[15:0]: Prescaler value
ARR is the value to be loaded in the actual auto-reload register.
Refer to the Section 17.4.1: Time-base unit on page 360 for more details about ARR update
and behavior.
The counter is blocked while the auto-reload value is null.
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