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5.10.2.

SPI interface characteristics

Table 41 SPI characteristics

Symbol

Parameter

Condition

Min

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

holotype

MHz

Slave mode

tr(SCK)

tf(SCK)

SPI clock rise and fall

time

Load capacitance:

C=30pF

16.854

tsu(NSS)

NSS setup time

Slave mode

433.33

th(NSS)

NSS holding time

Slave mode

115.43

tw(SCKH)

tw(SCKL)

SCK high and low time

holotype

54.592

57.4723

tsu(MI)

tsu(SI)

Data input setup time

holotype

30.304

Slave mode

50.889

th(MI)

th(SI)

Data input holding time

holotype

64.746

Slave mode

52.22

ta(SO)

Data output access

time

Slave mode

2.530

12.272

tdis(SO)

Data output prohibition

time

Slave mode

25.235

tv(SO)

Effective time of data

output

Slave mode (after

enable edge)

29.605

tv(MO)

Effective time of data

output

Master mode (after

enable edge)

7.220

th(SO)

Data output holding

time

Slave mode (after

enable edge)

16.222

th(MO)

Master mode (after

enable edge)

8.356

Figure 9 SPI timing diagram—slave mode and CPHA=0

NSS Input

MOSI Input

MISO

Output

CPHA=0

CPOL=0

CPHA=0

CPOL=1

MSB OUT

BIT 6~1 OUT

LSB OUT

LSB IN

MSB IN

BIT 6~1 IN

th(NSS)

tc(SCK)

tr(SCK)

tf(SCK)

tdls(SO)

th(SO)

tV(SO)

ta(SO)

tSU(SI)

tSU(NSS)

th(SCKH)

tW(SCKL)

SCK Input

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