STM32 TIM1 Internal Clock (CK_INT)
According to the datasheet snippet above, TIM1 can be clocked by the internal clock (CK_INT). What is this internal clock? I have a feeling that it's just the APB1 Timer Clocks (Mhz) in the below clock tree, but is that correct? Why is it called an internal clock in the datasheet?
timer stm32 clock
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
add a comment |
According to the datasheet snippet above, TIM1 can be clocked by the internal clock (CK_INT). What is this internal clock? I have a feeling that it's just the APB1 Timer Clocks (Mhz) in the below clock tree, but is that correct? Why is it called an internal clock in the datasheet?
timer stm32 clock
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
add a comment |
According to the datasheet snippet above, TIM1 can be clocked by the internal clock (CK_INT). What is this internal clock? I have a feeling that it's just the APB1 Timer Clocks (Mhz) in the below clock tree, but is that correct? Why is it called an internal clock in the datasheet?
timer stm32 clock
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
According to the datasheet snippet above, TIM1 can be clocked by the internal clock (CK_INT). What is this internal clock? I have a feeling that it's just the APB1 Timer Clocks (Mhz) in the below clock tree, but is that correct? Why is it called an internal clock in the datasheet?
timer stm32 clock
timer stm32 clock
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
asked Nov 24 '18 at 23:11
Ken LinKen Lin
73110
73110
add a comment |
add a comment |
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From the 48MHz limit I'm assuming it's an STM32F0 series MCU.
The clock tree is documented a few chapters back, in Reset and clock control (RCC) / Clocks.
Why is it called an internal clock in the datasheet?
Because it is, well... internal. As opposed to an external clock, which is coming from an external source.
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
add a comment |
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1 Answer
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1 Answer
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active
oldest
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From the 48MHz limit I'm assuming it's an STM32F0 series MCU.
The clock tree is documented a few chapters back, in Reset and clock control (RCC) / Clocks.
Why is it called an internal clock in the datasheet?
Because it is, well... internal. As opposed to an external clock, which is coming from an external source.
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
add a comment |
From the 48MHz limit I'm assuming it's an STM32F0 series MCU.
The clock tree is documented a few chapters back, in Reset and clock control (RCC) / Clocks.
Why is it called an internal clock in the datasheet?
Because it is, well... internal. As opposed to an external clock, which is coming from an external source.
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
add a comment |
From the 48MHz limit I'm assuming it's an STM32F0 series MCU.
The clock tree is documented a few chapters back, in Reset and clock control (RCC) / Clocks.
Why is it called an internal clock in the datasheet?
Because it is, well... internal. As opposed to an external clock, which is coming from an external source.
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
From the 48MHz limit I'm assuming it's an STM32F0 series MCU.
The clock tree is documented a few chapters back, in Reset and clock control (RCC) / Clocks.
Why is it called an internal clock in the datasheet?
Because it is, well... internal. As opposed to an external clock, which is coming from an external source.
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
answered Nov 25 '18 at 19:56
berendiberendi
3,9311624
3,9311624
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
add a comment |
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Yes it was F0, I should've specified! Even though this clock is "internal", it could still be derived from an external clock HSE right? That's why I thought the name internal clock was a bit weird.
– Ken Lin
Nov 27 '18 at 15:46
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
Upon digging a little more after this, I read that "Internal Clock (CK_INT)" is supposed to be "CK_TIM18 from RCC" (Found here: imgur.com/a/edeA8Nf). Is CK_TIM18 supposed to be what's pointed to by "to TIM1,3,6,7,14,15,16,17" in the picture you linked?
– Ken Lin
Nov 27 '18 at 22:29
add a comment |
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