NXP Semiconductors QorIQ LS1043ARDB - DSPI Interface Connections

2.3.3 DSPI interface
Serial peripheral interface (SPI) usually means deserial serial peripheral interface (DSPI)
on the LS1043ARDB. The SPI pins of the LS1043ARDB can be used to access the
following devices:
• Onboard SPI devices: For various SPI memory devices
• Offboard (TDM riser) device: For SLIC/SLAC interface circuitry
The LS1043ARDB has a DSPI master controller that is used to communicate with
various peripherals. The LS1043ARDB DSPI has the following features:
• SPI flash memory
• 4-pin DSPI jumper header
• LS1043A OVDD supports 1.8 V on the LS1043ARDB.
The figure below shows the LS1043A connections for DSPI.
SPI flash
(MT25QU128A
BA1EW7-0SIT)
SPI_CS0_B
K22
MCU
TDM
riser card
LS1043A
SPI_MOSI
SPI_MISO
SPI_CLK
SPI_CS0
OVDD
= 1.8 V
SPI_CS1
SPI_CS2
SPI_CS3
Level
shifter
1x4
header
SPI_CS1_B
1.8 V
3.3 V
3.3 V
SPI_CS[2:3]_B
Level
shifter
1.8 V
3.3 V
Figure 2-5. DSPI connections
Chapter 2 Interfaces
QorIQ LS1043A Reference Design Board Reference Manual, Rev. 4, 11/2017
NXP Semiconductors 23