
Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
20-56
Freescale Semiconductor
When the DSPI is the bus slave, CPOL and CPHA bits in the DSPI
x
_CTAR0 (SPI slave mode) or
DSPI
x
_CTAR1 (DSI slave mode) select the polarity and phase of the serial clock. Even though the bus
slave does not control the SCK signal, clock polarity, clock phase and number of bits to transfer must be
identical for the master device and the slave device to ensure proper transmission.
The DSPI supports four different transfer formats:
•
Classic SPI with CPHA = 0
•
Classic SPI with CPHA = 1
•
Modified transfer format with CPHA = 0
•
Modified transfer format with CPHA = 1
A modified transfer format supports high-speed communication with peripherals that require longer setup
times. The DSPI can sample the incoming data later than halfway through the cycle to give the peripheral
more setup time. The MTFE bit in the DSPI
x
_MCR selects between classic SPI format and modified
transfer format. The classic SPI formats are described in
Section 20.4.7.1, “Classic SPI Transfer Format
Section 20.4.7.2, “Classic SPI Transfer Format (CPHA = 1)
.” The modified transfer
formats are described in
Section 20.4.7.3, “Modified Transfer Format Enabled (MTFE = 1) with Classic
SPI Transfer Format Cleared (CPHA = 0) for SPI and DSI
Section 20.4.7.4, “Modified Transfer
Format Enabled (MTFE = 1) with Classic SPI Transfer Format Set (CPHA = 1) for SPI and DSI
In the SPI and DSI configurations, the DSPI provides the option of keeping the PCS signals asserted
between frames. See
Содержание MPC5566
Страница 12: ...MPC5566 Microcontroller Reference Manual Devices Supported MPC5566 MPC5566 RM Rev 2 0 23 Apr 2008...
Страница 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Страница 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Страница 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Страница 331: ...System Integration Unit SIU MPC5566 Microcontroller Reference Manual Rev 2 6 128 Freescale Semiconductor...
Страница 343: ...Crossbar Switch XBAR MPC5566 Microcontroller Reference Manual Rev 2 7 12 Freescale Semiconductor...
Страница 361: ...Error Correction Status Module ECSM MPC5566 Microcontroller Reference Manual Rev 2 8 18 Freescale Semiconductor...
Страница 455: ...Interrupt Controller INTC MPC5566 Microcontroller Reference Manual Rev 2 10 42 Freescale Semiconductor...
Страница 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Страница 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Страница 679: ...Boot Assist Module BAM MPC5566 Microcontroller Reference Manual Rev 2 16 20 Freescale Semiconductor...
Страница 997: ...Deserial Serial Peripheral Interface DSPI MPC5566 Microcontroller Reference Manual Rev 2 20 72 Freescale Semiconductor...
Страница 1037: ...Enhanced Serial Communication Interface eSCI MPC5566 Microcontroller Reference Manual Rev 2 21 40 Freescale Semiconductor...
Страница 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Страница 1081: ...Voltage Regulator Controller VRC and POR Module MPC5566 Microcontroller Reference Manual Rev 2 23 8 Freescale Semiconductor...
Страница 1093: ...IEEE 1149 1 Test Access Port Controller JTAGC MPC5566 Microcontroller Reference Manual Rev 2 24 12 Freescale Semiconductor...
Страница 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
Страница 1267: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 10...
Страница 1268: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 11...