STM32F107VB datasheet(60/95 Pages) STMICROELECTRONICS

60 / 95 page

Electrical characteristics

STM32F105xx, STM32F107xx

60/95

Doc ID 15274 Rev 4

I2S - SPI interface characteristics

Unless otherwise specified, the parameters given in Table 42 for SPI or in Table 43 for I2S

are derived from tests performed under the ambient temperature, fPCLKx frequency and VDD

supply voltage conditions summarized in Table 9.

Refer to Section 5.3.12: I/O port characteristics for more details on the input/output alternate

function characteristics (NSS, SCK, MOSI, MISO for SPI and WS, CK, SD for I2S).

Table 42.

SPI characteristics(1)

1. Remapped SPI1 characteristics to be determined.

Symbol

Parameter

Conditions

Min

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

MHz

Slave mode

tr(SCK)

tf(SCK)

SPI clock rise and fall

time

Capacitive load: C = 30 pF

DuCy(SCK)

SPI slave input clock

duty cycle

Slave mode

tsu(NSS)

(2)

2. Based on characterization, not tested in production.

NSS setup time

Slave mode

4 tPCLK

th(NSS)

(2)

NSS hold time

Slave mode

2 tPCLK

tw(SCKH)

(2)

tw(SCKL)

(2)

SCK high and low time

Master mode, fPCLK = 36 MHz,

presc = 4

tsu(MI)

(2)

tsu(SI)

(2)

Data input setup time

Master mode

Slave mode

th(MI)

(2)

th(SI)

(2)

Data input hold time

Master mode

Slave mode

ta(SO)

(2)(3)

3. Min time is for the minimum time to drive the output and the max time is for the maximum time to validate

the data.

Data output access

time

Slave mode, fPCLK = 20 MHz

3 tPCLK

tdis(SO)

(2)(4)

4. Min time is for the minimum time to invalidate the output and the max time is for the maximum time to put

the data in Hi-Z

Data output disable

time

Slave mode

tv(SO)

(2)(1)

Data output valid time

Slave mode (after enable edge)

tv(MO)

(2)(1)

Data output valid time

Master mode (after enable edge)

th(SO)

(2)

Data output hold time

Slave mode (after enable edge)

th(MO)

(2)

Master mode (after enable edge)

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