STM32U545NET3QTR datasheet(190/283 Pages) 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

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

190 / 283 page

Electrical characteristics

STM32U545xx

190/283

DS14216 Rev 1

Figure 28. AC timing diagram for high-speed external clock source (analog mode)

Low-speed external user clock generated from an external source

In bypass mode, the LSE oscillator is switched off and the input pin is a standard GPIO.

The external clock signal has to respect the I/O characteristics in Section 5.3.14: I/O port

characteristics. However, the recommended clock input waveform is shown in Figure 29

and Figure 30.

Figure 29. AC timing diagram for low-speed external square clock source

MSv71538V1

VHSE_ext

VHSE_ext_PP

tHSE_ext = 1/fHSE_ext

90%

10%

tf(HSE)

tr(HSE)

Table 78. Low-speed external user clock characteristics(1)

Symbol

Parameter

Min

Typ

Max

Unit

fLSE_ext

User external clock source frequency

32.768

kHz

VLSE_ext_PP

OSC32_IN peak-to-peak amplitude

0.3

VSW(2)

VLSE_ext

OSC32_IN input range

VSW(2)

tw(LSEH)

tw(LSEL)

OSC32_IN high or low time for square signal input

μs

1. Specified by design. Not tested in production.

2. VSW = VDD when VDD is above VBOR0, and VSW=VBAT when VDD is below VBOR0.

MSv67851V3

VLSEH

70%

30%

VLSEL

tw(LSEH)

tw(LSEL)

VLSE_ext

tLSE = 1/fLSE_ext

VLSE_ext_PP

STM32U545NET3QTR Datasheet(PDF) 190 Page - STMicroelectronics

STM32U545NET3QTR Datasheet(HTML) 190 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL