Renesas M16C/64C User Manual page 554

M16C/64C Group
f1
CLKi
SOUTi
SINi
i = 3, 4
n: Value set in the SiBRG register
Figure 24.1 SI/O3 and SI/O4 Block Diagram
Table 24.2 I/O Ports
Pin Name I/O
Output
CLKi
Input
SOUTi Output
SINi Input
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
f2SIO PCLK1
0
1/2
f1SIO
1
1/8
1/4
SMi3
SMi4
SMi6
CLK polarity
reversing
circuit
SMi2
SMi3
Function
Transmit/receive clock output
Transmit/receive clock input
Serial data output
Serial data input
Clock source select
SMi1 to SMi0
00b
f8SIO
01b
f32SIO 10b
0 1
SMi6
SI/O counter i
SMi5 LSB MSB
SiTRR register
PCLK1: Bit in the PCLKR register
SMi6 to SMi0: Bits in the SiC register
SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 1
SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 0
Port direction bits sharing pins = 0
SMi3 bit in the SiC register = 1
SMi2 bit in the SiC register = 0
SMi3 bit in the SiC register = 1
Port direction bits sharing pins = 0
(Dummy data is input only when transmitting.)
24. Serial Interface SI/O3 and SI/O4
Synchronous
1/(n + 1) 1/2
circuit
SiBRG register
SI/Oi interrupt
(IR bit in the SiIC
register)
Selecting Method
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