M37754 Mitsubishi, M37754 Datasheet - Page 46
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M37754
Manufacturer Part Number
M37754
Description
SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet
1.M37754.pdf
(114 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M37754S4CGP
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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SERIAL I/O PORTS
Two independent serial I/O ports are provided. Figure 54 shows a
block diagram of the serial I/O ports.
Bits 0, 1, and 2 of the UARTi(i = 0,1) Transmit/Receive mode register
shown in Figure 55 are used to determine whether to use port P8 as
parallel port, clock synchronous serial I/O port, or asynchronous
Fig. 54 Serial I/O port block diagram
Fig. 55 UARTi Transmit/Receive mode register bit configuration
46
7 6 5 4 3 2 1 0
CTS
Clock source selection
R
CLK
X
i
/RTS
D
i
i
Pf
Pf
Pf
Pf
i
2
16
64
512
External
Serial I/O mode select bit
0 0 0 : Parallel port
0 0 1 : Clock synchronous
1 0 0 : 7-bit UART
1 0 1 : 8-bit UART
1 1 0 : 9-bit UART
Internal/External clock select bit
Stop bit length select bit
Even/Odd parity select bit
Parity enable select bit
Sleep select bit
UART 0 Transmit/Receive mode register
UART 1 Transmit/Receive mode register
0 : Internal clock
1 : External clock
0 : 1 stop bit
1 : 2 stop bits
0 : Odd parity
1 : Even parity
0 : No parity
1 : With parity
0 : No sleep
1 : Sleep
UART0(31
UART1(39
Clock synchronous
generator
Internal
Bit rate
1/(n 1)
Divider
16
16
(Internal clock)
)
)
Clock synchronous
Clock synchronous
1/16 Divider
1/16 Divider
1/2 Divider
Clock synchronous
M37754M8C-XXXGP, M37754M8C-XXXHP
Clock synchronous
UART receive
UART transmission
(Internal clock)
(External clock)
0
Addresses
0
30
38
0
16
16
0
Transmission
control circuit
Receive
control
circuit
0
(UART) serial I/O port using start and stop bits.
Figures 56 and 57 show the connections of receiver/transmitter ac-
cording to the mode.
Figure 58 shows the bit configuration of the UARTi Transmit/Receive
control register.
Each communication method is described below.
Data bus(even)
0
M37754S4CGP, M37754S4CHP
Data bus(odd)
0 D
Receive clock
Transmission clock
8
D
Data bus(even)
8
Data bus
(odd)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
7
D
Receive register
D
7
Transmit register
6
D
Bit converter
D
6
Bit converter
5
D
D
5
4
D
MITSUBISHI MICROCOMPUTERS
D
4
UART0(37
UART1(3F
3
D
D
3
UART0(33
UART1(3B
2
D
D
2
1
D
D
1
0
D
16
16
0
Receive buffer register
,36
,3E
16
Transmit
buffer register
16
T
16
,32
16
,3A
X
)
)
D
16
16
i
)
)
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