STM32F303XD Datasheet, PDF (124/173 Pages) STMicroelectronics – ARM Cortex-M4 32b MCU+FPU, up to 512KB Flash, 80KB SRAM, FSMC, 4 ADCs, 2 DAC ch., 7 comp, 4 Op-Amp, 2.0-3.6 V

Electrical characteristics
STM32F303xD STM32F303xE
Figure 41. Recommended NRST pin protection
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6.3.17
069
1. The reset network protects the device against parasitic resets.
2.
The user must ensure that the level
Table 69. Otherwise the reset is not
on the NRST pin can go below the
taken into account by the device.
V_IL(NRST)
max
level
specified
in
3. Place the external capacitor 0.1u F on NRST as close as possible to the chip.
Timer characteristics
The parameters given in Table 70 are guaranteed by design.
Refer to Section 6.3.15: I/O port characteristics for details on the input/output alternate
function characteristics (output compare, input capture, external clock, PWM output).
Symbol
Table 70. TIMx⁽¹⁾⁽²⁾ characteristics
Parameter
Conditions
Min
Max
Unit
t_res(TIM)
f_EXT
Res_TIM
-
Timer resolution time
Timer external clock
frequency on CH1 to CH4
Timer resolution
f_TIMxCLK = 72 MHz
f_TIMxCLK = 144 MHz
-
f_TIMxCLK = 72 MHz
TIMx (except TIM2)
TIM2
1
13.9
6.95
0
0
-
-
-
-
-
f_TIMxCLK/2
36
16
32
t_TIMxCLK
ns
ns
MHz
MHz
bit
-
t_COUNTER 16-bit counter clock period _{fTIMxCLK = 72 MHz}
f_TIMxCLK = 144 MHz
t_{MAX_COUNT}
Maximum possible count
with 32-bit counter
-
f_TIMxCLK = 72 MHz
f_TIMxCLK = 144 MHz
1
0.0139
0.0069
-
-
-
65536
t_TIMxCLK
910
µs
455
µs
65536 × 65536 t_TIMxCLK
59.65
s
29.825
s
1. TIMx is used as a general term to refer to the TIM1, TIM2, TIM3, TIM4, TIM8, TIM15, TIM16, TIM17 and
TIM20 timers.
2. Guaranteed by design, not tested in production.
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