Mitsubishi microcomputers
M16C / 62P Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O
140
development
Preliminary Specifications Rev.1.0
Specifications in this manual are tentative and subject to change.
Figure 1.17.1. UARTi Block Diagram
Clock synchronous type
Clock synchronous type
Clock source selection
Internal
External
CTS/RTS disabled
CRD=1
CTS/RTSCRS=1
RxD
0
1 / (n
0
+1)
1/16
1/16
1/2
U0BRG
CLK
0
CTS
0
/ RTS
0
f
1SIO or
f
2SIO
f
8SIO
f
32SIO
V
CC
RTS
0
CTS
0
TxD
0
(UART0)
f
1SIO or
f
2SIO
1/2
1/8
f
8SIO
1/4
f
32SIO
f
1SIO
f
2SIO
PCLK1=0
PCLK1=1
00
2
01
2
10
2
CKDIR=0
CKDIR=1
CKPOL
CKDIR=0
CKDIR=1
CRS=0
CRD=0
RCSP=0
RCSP=1
reRxD polarity
Main clock, PLL clock, or ring oscillator clock
UART reception
Clock synchronous
type
UART transmission
Clock synchronous
Clock synchronous type
Receive
Transmit
Reception
control circuit
Transcircuit
Transmit/
receive
unit
rcircuit
rcircuit
CTS/RTS disabled
CTS
0
from UART1
UART reception
Clock synchronous
type
RxD
1
TxD
1
(UART1)
1 / (n
1
+1)
1/16
1/16
1/2
U1BRG
register
CLK
1
f
1SIO or
f
2SIO
f
8SIO
f
32SIO
CLK1 to CLK0
00
2
01
2
10
2
CKDIR=0
CKDIR=1
CKPOL
rcircuit
Clock output
CKDIR=0
CKDIR=1
V
CC
CRD=0
CRD=1
CLKMD0=0
CLKMD1=0
CRS=1
CRS=0
RCSP=0
RCSP=1
CLKMD0=1
CLKMD1=1
rRxD polarity
Clock source selection
Internal
External
UART transmission
Clock synchronous
type
Clock synchronous type
(when internal clock is selected)
Receive
Transmit
cReception
control circuit
receive
unit
rcircuit
Clock synchronous type
Clock synchronous type
RTS1
CTS1
CTS/RTS disabled
CTS/RTS disabled
CTS/RTS selected
CTS
0
from UART0
CTS
1
/ RTS
1
/
CTS
0
/ CLKS
1
Note: UART2 is the N-channel open-drain output. Cannot be set to the CMOS output.
i = 0 to 2
n
: Values set to the UiBRG register
SMD2 to SMD0, CKDIR: UiMR register's bits
CLK1 to CLK0, CKPOL, CRD, CRS: UiC0 register's bits
CLKMD0, CLKMD1, RCSP: UCON register's bits
RxD
2
CLK
2
CTS
2
/ RTS
2
RTS
2
CTS
2
TxD
2
(UART2)
1 / (n
2
+1)
1/16
1/16
1/2
U2BRG
register
f
1SIO or
f
2SIO
f
8SIO
f
32SIO
CLK1 to CLK0
00
2
01
2
10
2
CKDIR=0
CKDIR=1
CKPOL
rcircuit
CTS/RTS
selected
CKDIR=0
CKDIR=1
CRS=1
CRS=0
V
CC
CRD=0
cReception
Transmission
control circuit
UART reception
Clock synchronous
UART transmission
Clock synchronous
Clock synchronous type
Receive
clock
Transmit
reRxD polarity
Internal
External
Clock source selection
rcircuit
Transmit/
receive
unit
(Note)
Clock synchronous type
Clock synchronous type
CRD=1
CTS/RTS disabled