R01UH0092EJ0110 Rev.1.10
Page 521 of 807
Jul 31, 2012
M16C/64C Group
24. Serial Interface SI/O3 and SI/O4
Figure 24.1
SI/O3 and SI/O4 Block Diagram
Table 24.2
I/O Ports
Pin Name
I/O
Function
Selecting Method
CLKi
Output
Transmit/receive clock output
SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 1
Input
Transmit/receive clock input
SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 0
Port direction bits sharing pins = 0
SOUTi
Output
Serial data output
SMi3 bit in the SiC register = 1
SMi2 bit in the SiC register = 0
SINi
Input
Serial data input
SMi3 bit in the SiC register = 1
Port direction bits sharing pins = 0
(Dummy data is input only when transmitting.)
SiTRR register
SI/Oi interrupt
(IR bit in the SiIC
register)
SMi5 LSB MSB
SMi2
SMi3
SMi3
SMi6
SMi1 to SMi0
CLKi
SOUTi
SINi
SiBRG register
SMi6
i = 3, 4
n: Value set in the SiBRG register
1/(n + 1)
CLK polarity
reversing
circuit
1/2
f1SIO
f8SIO
f32SIO
f2SIO
PCLK1
SMi4
Clock source select
00b
01b
10b
f1
1
0
1
0
1/2
Synchronous
circuit
SI/O counter i
1/4
1/8
PCLK1: Bit in the PCLKR register
SMi6 to SMi0: Bits in the SiC register
Содержание M16C Series
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