M16C62P_06 Datasheet, PDF (242/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
17. Serial Interface
17.2 SI/O3 and SI/O4
Note
The M16C/62P (80-pin version) and M16C/62PT (80-pin version) do not include SIN3 pin of SI/O3. SI/O3
is only for transmission. Reception is impossible.
SI/O3 and SI/O4 are exclusive clock-synchronous serial I/Os.
Figure 17.38 shows the SI/O3 and SI/O4 Block Diagram, and Figure 17.39 to Figure 17.40 show the SI/O3 and SI/O4-
related registers.
Table 17.20 shows the SI/O3 and SI/O4 Specifications.
.
Main clock,
PLL clock,
f1SIO
or on-chip oscillator clock
f2SIO PCLK1=0
1/2
PCLK1=1
1/8
1/4
CLKi
SMi4
CLK
polarity
reversing
circuit
SMi3
SMi6
Clock source select
SMi1 to SMi0
00b
Data bus
f8SIO
01b
f32SIO
10b
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
NOTES :
1. i = 3, 4.
n = A value set in the SiBRG register.
Figure 17.38 SI/O3 and SI/O4 Block Diagram
Rev.2.41 Jan 10, 2006 Page 227 of 390
REJ09B0185-0241