M16C6S_09 Datasheet, PDF (132/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
SI/O3 and SI/O4
SI/O3 and SI/O4
SI/O3 and SI/O4 are exclusive clock-synchronous serial I/Os.
Figure 1.17.1 shows the block diagram of SI/O3 and SI/O4, and Figure 1.17.2 shows the SI/O3 and SI/O4-
related registers. SI/O4 is derectly connected to IT800 internally.
Table 1.17.1 shows the specifications of SI/O3 and SI/O4.
f2SIO
1/2
Main clock,
f1SIO
or On-chip Oscillator clock
1/8
PCLK1=0
PCLK1=1
1/4
CLKi
SMi4
CLK
polarity
reversing
circuit
SMi3
SMi6
Clock source select
SMi1 to SMi0
002
Data bus
f8SIO
012
f32SIO
102
Synchronous
circuit
SMi6
1/2
1/(n+1)
SiBRG register
SI/O counter i
SI/Oi
interrupt request
SOUTi
SMi2
SMi3
SMi5 LSB
MSB
SINi
SiTRR register
8
Note: i = 3, 4.
n = A value set in the SiBRG register.
Figure 1.17.1. SI/O3 and SI/O4 Block Diagram
Rev.5.01 Dec 10, 2009 page 132 of 201
REJ03B0014-0501