M16C29 Datasheet, PDF (241/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

M16C/29 Group
14. Serial I/O
14.2 SI/O3 and SI/O4
Note
The SI/O4 interrupt of peripheral function interrupt is not available in the 64-pin package.
SI/O3 and SI/O4 are exclusive clock-synchronous serial I/Os.
Figure 14.35 shows the block diagram of SI/O3 and SI/O4, and Figure 14.36 shows the SI/O3 and SI/O4-
related registers.
Table 14.20 shows the specifications of SI/O3 and SI/O4.
Main clock,
PLL clock,
f1SIO
or on-chip oscillator
clock
f2SIO PCLK1=0
1/2
1/8
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 14.35 SI/O3 and SI/O4 Block Diagram
Rev. 1.12 Mar.30, 2007 ^{page 217} of 458
REJ09B0101-0112