STM32U385CG datasheet(176/224 Pages) STMICROELECTRONICS

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Table 121. SPI characteristics

Evaluated by characterization. Not tested in production.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

SPI clock frequency

Master mode,1.71 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 1

48/33(1)

MHz

Slave receiver mode, 1.71 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 1

Slave mode transmitter/full duplex(3),

1.71 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 1

33/25(2)

Slave mode transmitter/full duplex(3),

2.7 V ≤ VDDIOX ≤ 3.6 V,

voltage range 1

Master or slave mode, 1.71 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 2

24/18.5(2)

Master or slave mode, 1.08 V ≤ VDDIO2 ≤ 1.32 V(4)

tsu(NSS)

NSS setup time

Slave mode

4 x TPCLK

th(NSS)

NSS hold time

Slave mode

2 x TPCLK

tw(SCKH)

tw(SCKL)

SCK high and low time

Master mode(5)

tSCK - 1

tSCK

tSCK + 1

tsu(MI)

Data input setup time

Master mode

3.5

tsu(SI)

Slave mode

2.5

th(MI)

Data input hold time

Master mode

th(SI)

Slave mode

ta(SO)

Data output access time

Slave mode

14.5

tdis(SO)

Data output disable time

Slave mode

tv(SO)

Data output valid time

Slave mode, 2.7 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 1

Slave mode, 1.71 V ≤ VDDIOX < 2.7 V,

Voltage range 1

15/20(2)

Slave mode, 1.71 V ≤ VDDIOX ≤ 3.6 V,

Voltage range 2

20.5/26.5(2)

Slave mode, 1.08 V ≤ VDDIO2 ≤ 1.32 V(4)

tv(MO)

Master mode

0.5

1.5/7.5(6)

th(SO)

Data output hold time

Slave mode

8.5

Slave mode, 1.08 V ≤ VDDIO2 ≤ 1.32 V(4)

th(MO)

Master mode

1. When using PA5, PA9, PD1

2. When using PA11.

3. Maximum frequency in Slave transmitter mode is determined by the sum of tv(SO) and tsu(MI) which must fit into SCK low or high phase

preceding the SCK sampling edge. This value can be achieved when the SPI communicates with a master having tsu(MI) = 0 while

Duty(SCK) = 50%.

4. The SPI is mapped on port G I/Os, that is supplied by VDDIO2 specified down to 1.08 V. The SPI is tested at this value.

tSCK = tspi_ker_ck × baud rate prescaler.

6. When using PA12/PB15.

STM32U385xx

Electrical characteristics

DS14830 - Rev 2

page 176/224

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