HT32F1253_12 datasheet(31/35 Pages) HOLTEK

31 / 35 page

Rev. 1.10

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SPI Characteristics

Table 19. SPI Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

SCK c�ock f�equency

—

fPCLK/4

MHz

tSCK(H)

SCK c�ock high time

—

fPCLK/8

—

tSCK(L)

SCK c�ock �ow time

—

fPCLK/8

—

SPI Maste� mode

tV(MO)

Data out�ut va�id time

—

tH(MO)

Data out�ut ho�d time

—

�

—

tSU(MI)

Data in�ut setu� time

—

tH(MI)

Data in�ut ho�d time

—

SPI S�ave mode

tSU(SEL)

SEL enab�e setu� time

—

4 tPCLK

—

tH(SEL)

SEL enab�e ho�d time

—

� tPCLK

—

t�(SO)

Data out�ut access time

—

� tPCLK

tDIS(SO)

Data out�ut disab�e time

—

tV(SO)

Data out�ut va�id time

—

�5

tH(SO)

Data out�ut ho�d time

—

tSU(SI)

Data in�ut setu� time

—

tH(SI)

Data in�ut ho�d time

—

SCK (CPOL = 0)

SCK (CPOL = 1)

MOSI

MISO

MOSI

MISO

tSCK(H)

tSCK(L)

tSCK

DATA VALID

tV(MO)

CPHA = 0

CPHA = 1

tH(MO)

tH(MI)

tSU(MI)

tV(MO)

tH(MO)

tSU(MI)

tH(MI)

DATA VALID

Figure 8. SPI Timing Diagram – SPI Master Mode

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