K11P121M50SF4 Datasheet, PDF (45/59 Pages) Freescale Semiconductor, Inc – K11 Sub-Family Data Sheet

Peripheral operating requirements and behaviors
6.8.1 DSPI switching specifications (limited voltage range)
The DMA Serial Peripheral Interface (DSPI) provides a synchronous serial bus with
master and slave operations. Many of the transfer attributes are programmable. The tables
below provide DSPI timing characteristics for classic SPI timing modes. Refer to the
DSPI chapter of the Reference Manual for information on the modified transfer formats
used for communicating with slower peripheral devices.
Table 33. Master mode DSPI timing (limited voltage range)
Num
DS1
DS2
DS3
Description
Operating voltage
Frequency of operation
DSPI_SCK output cycle time
DSPI_SCK output high/low time
DSPI_PCSn valid to DSPI_SCK delay
DS4 DSPI_SCK to DSPI_PCSn invalid delay
DS5 DSPI_SCK to DSPI_SOUT valid
DS6 DSPI_SCK to DSPI_SOUT invalid
DS7 DSPI_SIN to DSPI_SCK input setup
DS8 DSPI_SCK to DSPI_SIN input hold
Min.
2.7
—
2 x t_BUS
(t_SCK/2) − 2
(t_BUS x 2) −
2
(t_BUS x 2) −
2
—
−2
15
0
Max.
3.6
25
—
(t_SCK/2) + 2
—
—
8.5
—
—
—
Unit
V
MHz
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1
2
1. The delay is programmable in SPIx_CTARn[PSSCK] and SPIx_CTARn[CSSCK].
2. The delay is programmable in SPIx_CTARn[PASC] and SPIx_CTARn[ASC].
DSPI_PCSn
DSPI_SCK
(CPOL=0)
DSPI_SIN
DSPI_SOUT
DS3
DS2
DS1
DS4
DS7
DS8
First data
DS5
First data
Data
Last data
DS6
Data
Last data
Figure 16. DSPI classic SPI timing — master mode
Num
DS9
Table 34. Slave mode DSPI timing (limited voltage range)
Description
Min.
Operating voltage
2.7
Frequency of operation
DSPI_SCK input cycle time
4 x t_BUS
Table continues on the next page...
Max.
3.6
12.5
—
K11 Sub-Family Data Sheet Data Sheet, Rev. 3, 08/2012.
Freescale Semiconductor, Inc.
Unit
V
MHz
ns
45