Renesas 4513 用户手册
1-38
HARDWARE
4513/4514 Group User’s Manual
FUNCTION BLOCK OPERATIONS
(5) How to use serial I/O
Figure 24 shows the serial I/O connection example. Serial I/O inter-
rupt is not used in this example. In the actual wiring, pull up the
wiring between each pin with a resistor. Figure 25 shows the data
transfer timing and Table 13 shows the data transfer sequence.
Fig. 24 Serial I/O connection example
S
OUT
S
RDY
signal
S
CK
S
IN
D
5
S
CK
S
OUT
S
IN
D
5
Master (clock control)
Serial I/O interrupt enable bit
(SNZSI instruction is valid)
Interrupt control register V2
Serial I/O mode register J1
Serial I/O port
S
S
CK,
S
OUT,
S
IN
Instruction clock divided by
8 or 4 selected as a transfer
clock
8 or 4 selected as a transfer
clock
Internal clock selected as
a synchronous clock
a synchronous clock
Slave (external clock)
✕
0
1
(Bit 3)
(Bit 0)
1
✕
✕
0
1
✕
✕
✕
✕
This bit is not valid
when J1
when J1
0
=“0”
✕
: Set an arbitrary value.
(Bit 3)
(Bit 0)
(Bit 3)
(Bit 0)
(Bit 3)
(Bit 0)
0
✕
✕
✕
Serial I/O interrupt enable bit
(SNZSI instruction is valid)
Interrupt control register V2
Serial I/O port
S
S
CK,
S
OUT,
S
IN
External clock selected as
a synchronous clock
a synchronous clock
Serial I/O mode register J1