STM32F100RC datasheet(81/106 Pages) STMICROELECTRONICS

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STM32F100xC, STM32F100xD, STM32F100xE

Electrical characteristics

105

SPI interface characteristics

Unless otherwise specified, the parameters given in Table 50 are preliminary values derived

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

voltage conditions summarized in Table 9.

Refer to Section 5.3.13: I/O current injection characteristics for more details on the

input/output alternate function characteristics (NSS, SCK, MOSI, MISO).

Table 50. SPI characteristics

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)(1)

1. Preliminary values.

NSS setup time

Slave mode

4tPCLK

th(NSS)(1)

NSS hold time

Slave mode

2tPCLK

tw(SCKH)(1)

tw(SCKL)(1)

SCK high and low time

Master mode, fPCLK = 24 MHz,

presc = 4

tsu(MI) (1)

tsu(SI)(1)

Data input setup time

Master mode

Slave mode

th(MI) (1)

Data input hold time

Master mode

th(SI)(1)

Slave mode

ta(SO)(1)(2)

2. 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 = 24 MHz

3tPCLK

tdis(SO)(1)(3)

3. 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) (1)

Data output valid time

Slave mode (after enable edge)

tv(MO)(1)

Data output valid time

Master mode (after enable

edge)

-5

th(SO)(1)

Data output hold time

Slave mode (after enable edge)

th(MO)(1)

Master mode (after enable

edge)

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