APPLICATION
2.4 Serial I/O
2-42 4513/4514 Group User’s Manual
2.4.3 Operation description
Figure 2.4.2 shows the serial I/O connection example, Figure 2.4.3 shows the serial I/O register state, and
Figure 2.4.4 shows the serial I/O transfer timing.
Fig. 2.4.2 Serial I/O connection example
Fig. 2.4.3 Serial I/O register state when transmitting/receiving
S7S6S5S4S3S2S1S0
M7M6M5M4M2M3M1M0
Master (M7–M0: Transfer data)
Serial I/O register (SI)
SIN pin
SIN pinSOUT pin
SOUT pin
Slave (S7–S0: Transfer data)
Serial I/O register (SI)
M7M6M5M4M2M3M1M0
M6M5M4M2M3M1
M6M5M4M2M3M1S0
M7
M7
M6M5M4M2M3S0M7
S7S6S5S4S3S2S1S0
S7S6S5S4S3S2S1S0
S7S6S5S4S3S2S1
S7S6S5S4S3S2S1M0
S7S6S5S4S3S2M0
M7M6M5M4M2M3M1M0
Transfer data setting
Transfer starts
Falling of clock
Rising of clock
Falling of clock
Transfer completes
∗
∗
∗
∗
SOUT
SCK
SIN
D5
SCK
SOUT
SIN
D5
4513/4514 4513/4514
Master (internal clock selected) Slave (external clock selected)
Control signal
Note: The control signal is used to inform the master by the pin level
that the slave is in a ready state to receive.
The 4513/4514 Group does not have a control pin exclusively
used for serial I/O.
Accordingly, if a control signal is required, use the normal input/output ports.