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Section 16 Renesas Serial Peripheral Interface
Page 812 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
(3) Master/Multi-Slave (with This LSI Acting as Slave)
Figure 16.5 shows a master/multi-slave system configuration example when this LSI is used as a
slave. In the example of figure 16.5, the system is comprised of an master and two LSIs (slave X
and slave Y).
The RSPCK and MOSI outputs of the master are connected to the RSPCK and MOSI inputs of the
LSIs (slave X and slave Y). The MISO outputs of the LSIs (slave X and slave Y) are all connected
to the MISO input of the master. SSLX and SSLY outputs of the master are connected to the SSL
inputs of the LSIs (slave X and slave Y), respectively.
The master always drives RSPCK, MOSI, SSLX, and SSLY. Of the LSIs (slave X and slave Y),
the slave that receives low level input into the SSL0 input drives MISO.
This LSI (slave X)Master
RSPCK
MOSI
MISO
SSL
This LSI (slave Y)
RSPCK
MOSI
MISO
SSL
RSPCK
MOSI
MISO
SSLX
SSLY
Figure 16.5 Master/Multi-Slave Configuration Example (This LSI = Slave)