STM32U535NET3QTR datasheet(245/278 Pages) STMICROELECTRONICS

部件名	STM32U535NET3QTR

功能描述	Ultra-low-power Arm® Cortex®-M33 MCUTrustZone®FPU,240 DMIPS, up to 512 KB flash memory, 274 KB SRAM

PDF	278 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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245 / 278 page

DS14217 Rev 1

245/278

STM32U535xx

Electrical characteristics

253

Figure 51. USART timing diagram in master mode

Table 126. USART characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fCK

USART clock

frequency

Master mode, 1.71 V ≤ VDDIOX ≤ 3.6 V

MHz

Slave receiver, 1.71 V ≤ VDDIOX ≤ 3.6 V

Slave transmitter, 1.71 V ≤ VDDIOX ≤ 3.6 V

28.5

Slave transmitter, 2.7 V ≤ VDDIOX ≤ 3.6 V

tsu(NSS)

NSS setup

time

Slave mode

Tker(2) + 2

th(NSS) NSS hold time Slave mode

tw(CKH)

tw(CKL)

CK high and

low time

Master mode

1/fCK / 2 - 1 1/fCK / 2 1/fCK / 2 + 1

tsu(RX)

Data input

setup time

Master mode

Slave mode

th(RX) Data input

hold time

Master mode

th(RX)

Slave mode

tv(TX)

Data output

valid time

Slave mode, 2.7 V ≤ VDD ≤ 3.6 V

17.5

Slave mode, 1.71 V ≤ VDD ≤ 3.6 V

15.5

tv(TX)

Master mode

2.5

6.5

th(TX)

Data output

hold time

Slave mode

8.5

th(TX)

Master mode

1. Evaluated by characterization. Not tested in production.

2. Tker is the usart_ker_ck_pres clock period.

MSv65386V4

CPHA = 0

OUTPUT

INPUT

CPHA = 0

LSB OUT

LSB IN

CPOL = 0

CPOL = 1

BIT1 OUT

1/fCK

tw(CKH)

tw(CKL)

th(RX)

CPHA = 1

CPOL = 0

CPOL = 1

tsu(RX)

tv(TX)

th(TX)

MSB IN

BIT6 IN

MSB OUT

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