M16C6K9 Datasheet, PDF (127/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Clock asynchronous serial I/O (UART) mode
S I/O3, 4
S I/O3, 4
S I/O 3 and S I/O 4 are exclusive clock-synchronous serial I/Os.
Fig.GA-28 shows the S I/O 3, 4 block diagram, and Fig.GA-29 shows the S I/O 3, 4 control register.
Table.GA-9 shows the specifications of S I/O 3, 4.
CLKi
f1
f8
f32
SMi3
SMi6
SMi1
SMi0
Data bus
Synchronous
circuit
SMi6
1/2
1/(ni+1)
Transfer rate register (8)
S I/O counter i (3)
S I/Oi
interrupt request
SOUTi
SMi2
SMi3
SMi5 LSB
MSB
SINi
S I/Oi transmission/reception register (8)
8
Note: i = 3, 4.
ni = A value set in the S I/O transfer rate register i (036316, 036716).
Fig.GA-28 S I/O3, 4 block diagram
Rev.1.00 Jun 06, 2003 page 127 of 290