HT32F52230 datasheet(33/39 Pages) HOLTEK

33 / 39 page

Rev. 1.21

33 of 39

April 11, 2017

32-Bit ARM® Cortex™-M0+ MCU

HT32F52220/HT32F52230

SPI Characteristics

Table 20 SPI Characteristics

Symbol

Parameter

Conditions

Min Typ Max Unit

SPI Master mode

fSCK

SPI master output SCK

clock frequency

SPI peripheral clock frequency fPCLK

—

— fPCLK/2 MHz

tSCK(H)

tSCK(L)

SCK clock high and low

time

—

tSCK/2

- 2

— t

SCK

+ 1

tV(MO)

Data output valid time

—

tH(MO)

Data output hold time

—

tSU(MI)

Data input setup time

—

tH(MI)

Data input hold time

—

SPI Slave mode

fSCK

SPI slave input SCK clock

frequency

SPI peripheral clock frequency fPCLK

—

— fPCLK/3 MHz

DutySCK SPI slave input SCK clock

duty cycle

—

tSU(SEL)

SEL enable setup time

—

3 tPCLK —

—

tH(SEL)

SEL enable hold time

—

2 tPCLK —

—

tA(SO)

Data output access time

—

— 3 tPCLK ns

tDIS(SO)

Data output disable time

—

tV(SO)

Data output valid time

—

tH(SO)

Data output hold time

—

tSU(SI)

Data input setup time

—

tH(SI)

Data input hold time

—

Note: 1. fSCK is SPI output/input clock frequency and tSCK = 1/fSCK.

2. fPCLK is SPI peripheral clock frequency and tPCLK = 1/fPCLK.

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