m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 280
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Fig. 11.3.2 Initial setting example for relevant registers when transmitting
b7
UART0 transmit/receive mode register (Address 30
UART1 transmit/receive mode register (Address 38
UART2 transmit/receive mode register (Address B0
UART0 transmit/receive control register 0 (Address 34
UART1 transmit/receive control register 0 (Address 3C
UART2 transmit/receive control register 0 (Address B4
Serial I/O pin control register (Address AC
b7
0
b7
0
0
b0
b0
1
b0
CTS
CTS
TxD
TxD
CTS
TxD
Selection of clock synchronous serial
I/O mode
Internal/External clock select bit
BRG count source select bits
CTS/RTS function select bit
CTS/RTS enable bit
CLK polarity select bit
Transfer format select bit
0: Functions as TxD
0: Functions as TxD
0: CTS
0: CTS
0: CTS
0: Functions as TxD
0: Internal clock
1: External clock
b1 b0
0 0: f
0 1: f
1 0: f
1 1: f
Note: In the clock synchronous serial I/O
0: At the falling edge of the transfer
1: At the rising edge of the transfer
0: LSB first
1: MSB first
0
1
2
0: CTS function selected
1: RTS function selected
0
1
2
16
: It may be either “0” or “1.”
/P1
/P1
/P8
0: CTS/RTS function is enabled.
1: CTS/RTS function is disabled.
/RTS
/RTS
/RTS
clock, transmit data is output
clock, transmit data is output
2
16
64
512
3
7
3
0
mode, CTS
be selected. (Refer to section “[Pre-
cautions for clock synchronous
serial I/O mode].”)
1
2
switch bit
switch bit
switch bit
/RTS
/RTS
/RTS
0
1
2
16
separate select bit
separate select bit
separate select bit
)
0
1
2
are used together (Note)
are used together (Note)
are used together (Note)
7905 Group User’s Manual Rev.1.0
i
/RTS
16
16
0.
1.
16
2.
)
)
)
16
16
16
i
separation cannot
)
)
)
11.3 Clock synchronous serial I/O mode
UART0 baud rate register (BRG0) (Address 31
UART1 baud rate register (BRG1) (Address 39
UART2 baud rate register (BRG2) (Address B1
UART0 transmit interrupt control register (Address 71
UART1 transmit interrupt control register (Address 73
UART2 transmit interrupt control register (Address F1
When external clock is selected
b7
b7
UART0 transmit/receive control register 1 (Address 35
UART1 transmit/receive control register 1 (Address 3D
UART2 transmit/receive control register 1 (Address B5
(In the case of selecting the CTS function, transmission
starts when the CTS
UART0 transmit buffer register (Address 32
UART1 transmit buffer register (Address 3A
UART2 transmit buffer register (Address B2
b7
b7
Transmission starts.
b0
0
b0
pin’s input level is “L.”)
Can be set to “00
Interrupt priority level select bits
When using interrupts, set these bits to
one of levels 1 to 7.
When disabling interrupts, set these bits
to level 0.
When internal clock is selected
b0
b0
1
Transmit enable bit
SERIAL I/O
Transmit data is set.
1: Transmission is enabled.
16
16
16
16
)
)
)
” to “FF
16
16
16
16
16
16
)
)
16
)
)
)
)
.”
16
16
16
)
)
)
11-25
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