STM32U073RCT6 datasheet(105/146 Pages) STMICROELECTRONICS

Part #	STM32U073RCT6

Description	Ultra-low-power Arm® Cortex®-M0 32-bit MCU, up to 256-Kbyte flash memory, 40-Kbyte SRAM, USB, LCD

PDF	146 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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105 / 146 page

Table 86. USART characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fCK

USART clock frequency

Master mode

6.75

MHz

Slave mode

tsu(NSS)

NSS setup time

Slave mode

tker + 2

nsnsns

th(NSS)

NSS hold time

0.5

tw(CKH)

SCK high time

Master mode

1 / fCK / 2 - 1

1 / fCK / 2

1 / fCK / 2 + 1

tw(CKL)

SCK low time

tsu(RX)

Data input setup time

Master mode

Slave mode

th(RX)

Data input hold time

Master mode

Slave mode

0.5

tv(TX)

Data output valid time,

Master mode

0.5

Slave mode, 2.7 V ≤ VDD ≤ 3.6 V

19.5

Slave mode, 1.71 V ≤ VDD ≤ 3.6 V

27.5

th(TX)

Data output hold time

Master mode

Figure 29. USART timing diagram in SPI master mode

1/fCK

tw(CKH)

tw(CKL)

CPHA=0

CPOL=0

CPHA=0

CPOL=1

TX output

RX input

MSB OUT

LSB OUT

BIT1 OUT

MSB IN

LSB IN

BIT6 IN

CPHA=1

CPOL=0

CPHA=1

CPOL=1

tsu(RX)

tv(TX)

th(TX)

th(RX)

STM32U073x8/B/C

Electrical characteristics

DS14548 - Rev 2

page 105/146

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