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STM32U545NET3QTR Datasheet(PDF) 248 Page - STMicroelectronics

Part # STM32U545NET3QTR
Description  Ultra-low-power Arm® Cortex®-M33 MCUTrustZone®FPU,240 DMIPS, 512 KB flash memory, 274 KB SRAM, crypto
PDF  283 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32U545NET3QTR Datasheet(HTML) 248 Page - STMicroelectronics

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Electrical characteristics
STM32U545xx
248/283
DS14216 Rev 1
5.3.32
Delay block characteristics
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature, fHCLK frequency and VDD supply voltage
conditions summarized in Table 33.
Table 124. IWDG min/max timeout period at 32 kHz (LSI)(1)
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
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.
Table 125. WWDG min/max timeout value at 160 MHz (PCLK)
Prescaler
WDGTB
Min timeout value
Max timeout value
Unit
1
0
0.025
1.638
ms
2
1
0.051
3.276
4
2
0.102
6.553
8
3
0.204
13.107
16
4
0.409
26.214
32
5
0.819
52.428
46
6
1.177
75.366
128
7
3.276
209.715
Table 126. Delay block characteristics(1)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tinit
Initial delay
-
350
750
1550
ps
t∆
Unit delay
-
34
41
51
1. Evaluated by characterization. Not tested in production.



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