M30240ECFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30240ECFP Datasheet - Page 83

• Manufacturer Part Number: M30240ECFP
• Description: M30240 Group Specification
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Preliminary Specifications REV. E
Specifications in this manual are tentative and subject to change
UART0 through UART2
2.23 UART0 through UART2
Figure 1.74: Block diagram of UARTi (i=0 to 2)
Serial I/O is configured as three channels: UART0, UART1, and UART2. UART0, UART1, and UART2
each have an exclusive timer to generate a transfer clock, so they operate independently of each other.
Figure 1.74 shows the block diagram of UART0, UART1, and UART2.
(UART0)
(UART1)
(UART2)
CTS
CTS
CTS
0
1
2
/ RTS
/ RTS
CLKS
/ RTS
RxD
RxD
CLK
RxD
CLK
CLK
Clock source selection
Clock source selection
2
0
0
0
1
1
1
2
2
1
Clock source selection
f
f
f
f
f
f
1
8
32
f
f
f
1
8
32
1
8
32
reversing
reversing
reversing
polarity
polarity
polarity
circuit
circuit
circuit
CLK
CLK
CLK
reversing circuit
CTS/RTS selected
RxD polarity
Internal
Internal
Internal
CTS/RTS
selected
External
Clock output pin
select switch
External
External
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when internal clock is selected)
V
CC
Bit rate generator
Bit rate generator
(address 03A1
(address 0379
Bit rate generator
(address 03A9
1 / (n
1 / (n
1 / (n
Vcc
CTS/RTS disabled
CTS/RTS disabled
CTS/RTS disabled
CTS/RTS disabled
0
1
2
+1)
+1)
+1)
16
16
16
)
)
)
Clock synchronous type
Clock synchronous type
1/16
1/16
1/16
1/16
1/2
Clock synchronous type
Clock synchronous type
1/2
1/16
1/16
Clock synchronous type
1/2
Clock synchronous type
CTS/RTS disabled
V
CC
Clock synchronous type
(when internal clock is selected)
UART reception
UART transmission
Clock synchronous type
(when internal clock is selected)
UART reception
UART transmission
1-83
UART reception
UART transmission
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when external clock is
selected)
RTS
CTS
RTS
CTS
Clock synchronous type
(when external clock is
selected)
Clock synchronous type
(when external clock is
selected)
CTS/RTS disabled
2
2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
0
0
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)
RTS
Transmission
control circuit
control circuit
CTS
Reception
1
Transmission
control circuit
Transmission
control circuit
control circuit
control circuit
1
Reception
Reception
Receive
clock
Transmit
clock
Receive
clock
Transmit
clock
Receive
clock
Transmit
clock
Transmit/
receive
Mitsubishi microcomputers
unit
M30240 Group
Transmit/
Transmit/
receive
receive
unit
unit
reversing
polarity
circuit
TxD
TxD
TxD
TxD
0
1
2