Figure 18-3. A Typical Full-Duplex Connection; Figure 18-4. A Typical Simplex Connection (Master: Receive, Slave: Transmit); Figure 18-5. A Typical Simplex Connection (Master: Transmit Only, Slave: Receive) - GigaDevice Semiconductor GD32VF103 User Manual

Mode Description
Slave reception with
SRB
bidirectional connection

Figure 18-3. A typical full-duplex connection

Master
MFD
SCK
MISO
MOSI
NSS

Figure 18-4. A typical simplex connection (Master: Receive, Slave: Transmit)

Master
MRU
SCK
MISO
MOSI
NSS

Figure 18-5. A typical simplex connection (Master: Transmit only, Slave: Receive)

Master
MTU
SCK
MISO
MOSI
NSS
GD32VF103 User Manual
Register configuration
BDEN = 1
BDOEN = 1
MSTMOD = 0
RO = 0
BDEN = 1
BDOEN = 0
Slave
SFD
SCK
MISO
MOSI
NSS
Slave
STU
SCK
MISO
MOSI
NSS
Slave
SRU
SCK
MISO
MOSI
NSS
Data pin usage
MOSI: Not used
MISO: Reception
384