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STM32F20xxx Electrical characteristics
177
6.3.18 TIM timer characteristics
The parameters given in Table 50 and Table 51 are guaranteed by design.
Refer to Section 6.3.16: I/O port characteristics for details on the input/output alternate
function characteristics (output compare, input capture, external clock, PWM output).
Table 50. Characteristics of TIMx connected to the APB1 domain
(1)
1. TIMx is used as a general term to refer to the TIM2, TIM3, TIM4, TIM5, TIM6, TIM7, and TIM12 timers.
Symbol Parameter Conditions Min Max Unit
t
res(TIM)
Timer resolution time
AHB/APB1
prescaler distinct
from 1, f
TIMxCLK
=
60 MHz
1-
t
TIMxCLK
16.7 - ns
AHB/APB1
prescaler = 1,
f
TIMxCLK
= 30 MHz
1-
t
TIMxCLK
33.3 - ns
f
EXT
Timer external clock
frequency on CH1 to CH4
f
TIMxCLK
= 60 MHz
APB1= 30 MHz
0
f
TIMxCLK
/2
MHz
030MHz
Res
TIM
Timer resolution - 16/32 bit
t
COUNTER
16-bit counter clock period
when internal clock is
selected
1 65536
t
TIMxCLK
0.0167 1092 µs
32-bit counter clock period
when internal clock is
selected
1-
t
TIMxCLK
0.0167 71582788 µs
t
MAX_COUNT
Maximum possible count
- 65536 × 65536
t
TIMxCLK
- 71.6 s