Table of Contents
Advertisement
Under development
This document is under development and its contents are subject to change.
M16C/6N Group (M16C/6NK, M16C/6NM)
(UART0)
RXD0
Clock source selection
CLK1 to CLK0
00h
f1SIO or f2SIO
01h
f8SIO
10h
f32SIO
CLK0
CTS0 /
RTS0
CTS
n0: Values set to the U0BRG register
PCLK1: Bit in PCLKR register
SMD2 to SMD0, CKDIR: Bits in U0MR register
CLK1 to CLK0, CKPOL, CRD, CRS: Bits in U0C0 register
RCSP: Bit in UCON register
Figure 15.1 UART0 Block Diagram
Main clock, PLL clock, or on-chip oscillator clock
(UART1)
RXD1
Clock source selection
CLK1 to CLK0
f1SIO or f2SIO
f8SIO
f32SIO
CLK1
CTS1 / RTS1/
CTS0 / CLKS1
n1: Values set to the U1BRG register
PCLK1: Bit in PCLKR register
SMD2 to SMD0, CKDIR: Bits in U1MR register
CLK1 to CLK0, CKPOL, CRD, CRS: Bits in U1C0 register
CLKMD0, CLKMD1, RCSP: Bits in UCON register
Figure 15.2 UART1 Block Diagram
Rev.2.00
Nov 28, 2005
REJ09B0124-0200
Main clock, PLL clock, or on-chip oscillator clock
RXD polarity
reversing circuit
1/16
CKDIR
Internal
U0BRG
register
0
1 / (n0+1)
1/16
1
Clock synchronous type
External
1/2
Clock synchronous type
CKPOL
(when internal clock is selected)
CLK
polarity
reversing
circuit
CTS/RTS disabled
CTS/RTS selected
1
VSS
CTS/RTS disabled
CRS
0
RCSP
1
0
1
from UART1
0
0
CRD
RXD polarity reversing
circuit
1/16
CKDIR
00
U1BRG
Internal
01
register
0
10
1 / (n1+1)
1/16
1
External
1/2
Clock synchronous type
(when external clock is selected))
CKPOL
Clock synchronous type
CLKMD0
(when internal clock is selected)
CLK
0
polarity
reversing
circuit
1
CTS/RTS selected
1
Clock output
CTS/RTS disabled
pin select
CRS
1
0
VSS
CLKMD1
0
CTS/RTS disabled
1
0
CRD
page 150 of 378
PCLK1
f2SIO
0
1/2
1/2
f1SIO
1
1/8
1/4
UART reception
SMD2 to SMD0
010, 100, 101, 110
Reception
Clock synchronous
control circuit
type
001
UART transmission
Transmission
010, 100, 101, 110
control circuit
001
Clock synchronous type
(when internal clock is selected)
0
1
Clock synchronous
CKDIR
type
(when external clock
is selected)
RTS0
CTS0
PCLK1
f2SIO
0
1/2
1/2
f1SIO or f2SIO
f1SIO
1
f8SIO
1/8
1/4
f32SIO
UART reception
SMD2 to SMD0
010, 100, 101, 110
Reception
Clock synchronous
control circuit
type
001
UART transmission
010, 100, 101, 110
Transmission
Clock synchronous
control circuit
type
001
Clock synchronous type
(when internal clock is selected)
0
1
CKDIR
RTS1
CTS1
0
1
CTS0 from UART0
RCSP
15. Serial Interface
f1SIO or f2SIO
f8SIO
f32SIO
TXD0
TXD
polarity
reversing
circuit
Transmit/
Receive
receive
clock
unit
Transmit
clock
TXD1
TXD
polarity
reversing
circuit
Transmit/
Receive
receive
clock
unit
Transmit
clock
Advertisement
Table of Contents
