Datasheet

Electrical characteristics STM32F100x4, STM32F100x6, STM32F100x8, STM32F100xB
62/88 Doc ID 16455 Rev 7
5.3.15 TIMx characteristics
The parameters given in Ta ble 38 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).
5.3.16 Communications interfaces
I
2
C interface characteristics
Unless otherwise specified, the parameters given in Ta ble 3 9 are derived from tests
performed under the ambient temperature, f
PCLK1
frequency and V
DD
supply voltage
conditions summarized in Ta ble 8.
The STM32F100xx value line I
2
C interface meets the requirements of the standard I
2
C
communication protocol with the following restrictions: t
he I/O pins SDA and SCL are
mapped to are not “true” open-drain. When configured as open-drain, the PMOS connected
between the I/O pin and V
DD
is disabled, but is still present.
The I
2
C characteristics are described in Ta bl e 3 9. Refer also to
Section 5.3.12: I/O current
injection characteristics
for more details on the input/output alternate function characteristics
(SDA and SCL)
.
Table 38. TIMx characteristics
Symbol Parameter
Conditions
(1)
1. TIMx is used as a general term to refer to the TIM1, TIM2, TIM3, TIM4, TIM15, TIM16 and TIM17 timers.
Min Max Unit
t
res(TIM)
Timer resolution time
1t
TIMxCLK
f
TIMxCLK
= 24 MHz
41.7 ns
f
EXT
Timer external clock
frequency on CHx
(2)
2. CHx is used as a general term to refer to CH1 to CH4 for TIM1, TIM2, TIM3 and TIM4, to the CH1 to CH2
for TIM15, and to CH1 for TIM16 and TIM17.
0f
TIMxCLK
/2 MHz
f
TIMxCLK
= 24 MHz 0 12 MHz
Res
TIM
Timer resolution 16 bit
t
COUNTER
16-bit counter clock period
when the internal clock is
selected
1 65536 t
TIMxCLK
f
TIMxCLK
= 24 MHz
2730 µs
t
MAX_COUNT
Maximum possible count
65536 × 65536 t
TIMxCLK
f
TIMxCLK
= 24 MHz
178 s