STM32F479II datasheet(139/208 Pages) STMICROELECTRONICS

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STM32F479xx

Electrical characteristics

187

tw(SCKH)

tw(SCKL)

SCK high and low time Master mode, SPI presc = 2

TPCLK − 1.5

TPCLK

TPCLK+1.5

tsu(NSS)

NSS setup time

Slave mode, SPI presc = 2

4TPCLK

th(NSS)

NSS hold time

Slave mode, SPI presc = 2

2TPCLK

tsu(MI)

Data input setup time

Master mode

tsu(SI)

Slave mode

th(MI)

Data input hold time

Master mode

th(SI)

Slave mode

ta(SO)

Data output access time Slave mode, SPI presc = 2

tdis(SO)

Data output disable time Slave mode

tv(SO)

Data output valid time

Slave mode (after enable edge),

2.7V ≤ VDD ≤ 3.6V

-11

Slave mode (after enable edge),

1.71 V≤VDD≤3.6 V

-11

11.5

th(SO)

Data output hold time

Slave mode (after enable edge)

tv(MO)

Data output valid time

Master mode (after enable edge)

4.5

th(MO)

Data output hold time

Master mode (after enable edge)

1. Guaranteed based on test during characterization.

2. Maximum frequency in Slave transmitter mode is determined by the sum of tv(SO) and tsu(MI) which has to 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%

Table 64. SPI dynamic characteristics(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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