15 Quad Synchronous Serial Interface (QSPI)
15-4
Seiko Epson Corporation
S1C31D50/D51 TECHNICAL MANUAL
(Rev. 2.00)
#QSPISS
QSDIO3
QSDIO2
QSDIO1
QSDIO0
QSPICLK
#QSPISS
QSDIO3
QSDIO2
QSDIO1
QSDIO0
QSPICLK
#QSPISS
QSDIO3
QSDIO2
QSDIO1
QSDIO0
QSPICLK
External QSPI
slave devices
#QSPISSn
Px1
Px2
QSDIOn3
QSDIOn2
QSDIOn1
QSDIOn0
QSPICLKn
S1C31 QSPI
(register access
master mode)
Figure 15.2.2.4 Connections between QSPI in Register Access Master Mode
and External QSPI Slave Devices
#QSPISSn
QSDIOn1
QSDIOn0
QSPICLKn
#SPISS0
#SPISS1
#SPISS2
SDO
SDI
SPICK
S1C31 QSPI
(slave mode)
#SPISS
SDI
SDO
SPICK
#SPISS
SDI
SDO
SPICK
External single-I/O
SPI slave devices
External single-I/O
SPI master device
Figure 15.2.2.5 Connections between QSPI in Slave Mode and External Single-I/O SPI (Legacy SPI) Master Device