Datasheet

DS10198 Rev 8 207/270
STM32L476xx Electrical characteristics
238
Table 92. TIMx
(1)
characteristics
1. TIMx
,
is used as a general term in which x stands for 1,2,3,4,5,6,7,8,15,16 or 17.
Symbol Parameter Conditions Min Max Unit
t
res(TIM)
Timer resolution time
-1-t
TIMxCLK
f
TIMxCLK
= 80 MHz 12.5 - ns
f
EXT
Timer external clock
frequency on CH1 to CH4
-0f
TIMxCLK
/2 MHz
f
TIMxCLK
= 80 MHz 0 40 MHz
Res
TIM
Timer resolution
TIMx (except TIM2
and TIM5)
-16
bit
TIM2 and TIM5 - 32
t
COUNTER
16-bit counter clock
period
- 1 65536 t
TIMxCLK
f
TIMxCLK
= 80 MHz 0.0125 819.2 µs
t
MAX_COUNT
Maximum possible count
with 32-bit counter
- - 65536 × 65536 t
TIMxCLK
f
TIMxCLK
= 80 MHz - 53.68 s
Table 93. IWDG min/max timeout period at 32 kHz (LSI)
(1)
1. The exact timings still depend on the phasing of the APB interface clock versus the LSI clock so that there
is always a full RC period of uncertainty.
Prescaler divider PR[2:0] bits
Min timeout RL[11:0]=
0x000
Max timeout RL[11:0]=
0xFFF
Unit
/4 0 0.125 512
ms
/8 1 0.250 1024
/16 2 0.500 2048
/32 3 1.0 4096
/64 4 2.0 8192
/128 5 4.0 16384
/256 6 or 7 8.0 32768
Table 94. WWDG min/max timeout value at 80 MHz (PCLK)
Prescaler WDGTB Min timeout value Max timeout value Unit
1 0 0.0512 3.2768
ms
2 1 0.1024 6.5536
4 2 0.2048 13.1072
8 3 0.4096 26.2144
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