Peripheral operating requirements and behaviors
DSPI_PCSn
DS1
DS3
DS2
DS4
DSPI_SCK
(CPOL=0)
DS8
DS7
Data
Last data
First data
DSPI_SIN
DS5
DS6
First data
Data
Last data
DSPI_SOUT
Figure 15. DSPI classic SPI timing — master mode
Table 33. Slave mode DSPI timing (limited voltage range)
Num
Description
Min.
Max.
3.6
Unit
V
Operating voltage
2.7
Frequency of operation
12.5
—
MHz
ns
DS9
DSPI_SCK input cycle time
4 x tBUS
DS10
DS11
DS12
DS13
DS14
DS15
DS16
DSPI_SCK input high/low time
(tSCK/2) − 2
(tSCK/2) + 2
ns
ns
ns
ns
ns
ns
ns
DSPI_SCK to DSPI_SOUT valid
DSPI_SCK to DSPI_SOUT invalid
DSPI_SIN to DSPI_SCK input setup
DSPI_SCK to DSPI_SIN input hold
DSPI_SS active to DSPI_SOUT driven
DSPI_SS inactive to DSPI_SOUT not driven
—
0
20
—
—
—
14
14
2
7
—
—
DSPI_SS
DS10
DS9
DSPI_SCK
(CPOL=0)
DS15
DS12
DS16
DS11
First data
DS14
Last data
DSPI_SOUT
Data
Data
DS13
First data
Last data
DSPI_SIN
Figure 16. DSPI classic SPI timing — slave mode
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
Freescale Semiconductor, Inc.
47
FREESCALE [ Freescale ]
