STM32F103X8_13 Datasheet, PDF (69/105 Pages) STMicroelectronics – Medium-density performance line ARM-based 32-bit MCU with 64 or 128 KB Flash

STM32F103x8, STM32F103xB
Figure 31. Recommended NRST pin protection
Electrical characteristics
External
reset circuit⁽¹⁾
VDD
NRST⁽²⁾
RPU
0.1 µF
Internal reset
Filter
5.3.15
STM32F10x
ai14132d
2. The reset network protects the device against parasitic resets.
3. The user must ensure that the level on the NRST pin can go below the V_IL(NRST) max level specified in
Table 38. Otherwise the reset will not be taken into account by the device.
TIM timer characteristics
The parameters given in Table 39 are guaranteed by design.
Refer to Section 5.3.12: I/O current injection characteristics for details on the input/output
alternate function characteristics (output compare, input capture, external clock, PWM
output).
Table 39. TIMx⁽¹⁾ characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
t_res(TIM) Timer resolution time
f_TIMxCLK = 72 MHz
1
13.9
f_EXT
Timer external clock
frequency on CH1 to CH4 _{fTIMxCLK = 72 MHz}
0
0
f_TIMxCLK/2
36
Res_TIM Timer resolution
16
t_COUNTER
16-bit counter clock period
1
when internal clock is
selected
f_TIMxCLK = 72 MHz 0.0139
65536
910
t_{MAX_COUNT} Maximum possible count
f_TIMxCLK = 72 MHz
65536 × 65536
59.6
1. TIMx is used as a general term to refer to the TIM1, TIM2, TIM3 and TIM4 timers.
t_TIMxCLK
ns
MHz
MHz
bit
t_TIMxCLK
µs
t_TIMxCLK
s
Doc ID 13587 Rev 15
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