M16C65 Datasheet, PDF (590/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
24. Serial Interface SI/O3 and SI/O4
SM22
0
f1
1
fOCO-F
f1SIO
f2SIO PCLK1
Clock source select
1/2
0
SMi1 to SMi0
1
00b
1/8
f8SIO 01b
1/4 ^{f32SIO 10b}
1/(n+1)
1/2
Synchronous
circuit
SiBRG register
0
1
CLKi
SOUTi
SMi4
CLK polarity
recversing
circuit
SMi3
SMi6
SMi2
SMi3
SMi6
S I/O counter i
SMi5 LSB
MSB
SI/Oi interrupt
(IR bit in the SiIC
register)
SINi
SiTRR register
i = 3, 4
n: Value set in the SiBRG register
Figure 24.1 SI/O3 and SI/O4 Block Diagram
Table 24.2 Input/Output Pins
Pin Name
CLKi
SOUTi
SINi
Input/Output
Output
Input
Output
Input
Function
Selecting Method
Transmit/receive clock output SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 1
Transmit/receive clock input SMi3 bit in the SiC register = 1
SMi6 bit in the SiC register = 0
Port direction bits sharing pins = 0
Serial data output
SMi3 bit in the SiC register = 1
SMi2 bit in the SiC register = 0
Serial data input
SMi3 bit in the SiC register = 1
Port direction bits sharing pins = 0
(Dummy data is input only when transmitting.)
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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