DocID018909 Rev 11 573/1731
RM0090 Advanced-control timers (TIM1&TIM8)
581
Note: The state of the external I/O pins connected to the complementary OCx and OCxN channels
depends on the OCx and OCxN channel state and the GPIO registers.
17.4.10 TIM1&TIM8 counter (TIMx_CNT)
Address offset: 0x24
Reset value: 0x0000
17.4.11 TIM1&TIM8 prescaler (TIMx_PSC)
Address offset: 0x28
Reset value: 0x0000
17.4.12 TIM1&TIM8 auto-reload register (TIMx_ARR)
Address offset: 0x2C
Reset value: 0x0000
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CNT[15:0]
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Bits 15:0 CNT[15:0]: Counter value
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PSC[15:0]
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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”).
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ARR[15:0]
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Bits 15:0 ARR[15:0]: Auto-reload value
ARR is the value to be loaded in the actual auto-reload register.
Refer to Section 17.3.1: Time-base unit on page 515 for more details about ARR update
and behavior.
The counter is blocked while the auto-reload value is null.
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