Samsung S3F401F - Manual (Page 212)

S3F401F_UM_REV1.00 SSP
10-11
2.2.5 Examples of Master and Slave Configurations
Below figures show how the PrimeCell SSP (PL022) peripheral can be connected to other synchronous serial
peripherals, when it is configured as a master or slave.
NOTE
The SSP (PL022) does not support dynamic switching between master and slave in a system. Each
instance is configured and connected either as a master or slave.
SSPTXD
SSPRXD
SSPFSS
SSPCLK
PL022 Configured as Master
MOSI
MISO
SCK
0V
SS
SPI Slave
MOSI
MISO
SCK
0V
SS
SPI Slave
Figure 10-9. PrimeCell SSP Master Coupled to Two Slaves
Above figure shows how a PrimeCell SSP (PL022), configured as master, interfaces to two Motorola SPI slaves.
Each SPI Slave Select (SS) signal is permanently tied LOW and configures them as slaves. Similar to the above
operation, the master can broadcast to the two slaves through the master PrimeCell SSP SSPTXD line. In response,
only one slave drives its SPI MISO port onto the SSPRXD line of the master.