M30621ECGP MITSUBISHI [Mitsubishi Electric Semiconductor], M30621ECGP Datasheet - Page 87

• Manufacturer Part Number: M30621ECGP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Serial I/O
Figure 1.14.1. Block diagram of UARTi (i = 0 to 2)
(UART1)
/ CTS
(UART0)
(UART2)
CTS
Note: CLK and CTS/RTS of UART2 do not connect to outside.
CTS
0
0
1
/ CLKS
Clock synchronous serial I/O mode cannot be used in UART2.
/ RTS
/ RTS
RxD
RxD
CLK
RxD
CLK
Clock source selection
Clock source selection
2
0
0
0
1
1
1
1
Clock source selection
f
f
f
1
32
f
f
f
f
8
f
f
1
1
8
32
8
32
reversing
reversing
polarity
polarity
circuit
circuit
CLK
CLK
reversing circuit
CTS/RTS selected
RxD polarity
Internal
Internal
CTS0 from UART1
Internal
External
Clock output pin
select switch
External
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when internal clock is selected)
Vcc
Bit rate generator
Bit rate generator
(address 03A1
(address 0379
Bit rate generator
(address 03A9
CTS/RTS disabled
CTS/RTS separated
1 / (n
1 / (n
1 / (n
CTS/RTS disabled
CTS/RTS separated
1
0
2
+1)
+1)
+1)
16
16
16
)
)
)
Clock synchronous type
Clock synchronous type
1/16
1/16
1/16
1/16
Clock synchronous type
1/2
Clock synchronous type
1/2
CTS
1/16
1/16
V
Clock synchronous type
Clock synchronous type
1/2
CTS/RTS disabled
CC
Clock synchronous type
(when internal clock is selected)
UART reception
UART transmission
Clock synchronous type
(when internal clock is selected)
CTS/RTS disabled
0
UART reception
UART transmission
UART reception
UART transmission
Clock synchronous type
(when internal clock is selected)
RTS
CTS
Clock synchronous type
(when external clock is
selected)
Clock synchronous type
(when external clock is
selected)
0
0
CTS0 to UART0
RTS
CTS
n0 : Values set to UART0 bit rate generator (BRG0)
n1 : Values set to UART1 bit rate generator (BRG1)
n2 : Values set to UART2 bit rate generator (BRG2)
control circuit
Transmission
control circuit
Reception
1
1
Transmission
control circuit
Transmission
control circuit
control circuit
control circuit
Reception
Reception
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Receive
clock
Transmit
clock
M16C / 62 Group (80-pin)
Receive
clock
Transmit
clock
Receive
clock
Transmit
clock
Transmit/
receive
unit
Transmit/
Transmit/
receive
receive
Mitsubishi microcomputers
unit
unit
reversing
polarity
circuit
TxD
TxD
TxD
TxD
0
1
2
87