m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 261
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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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SERIAL I/O
11.2 Block description
Fig. 11.2.3 Structure of UARTi transmit/receive control register 0
11-6
11.2.2 UARTi transmit/receive control register 0
Figure 11.2.3 shows the structure of UARTi transmit/receive control register 0.
UART0 transmit/receive control register (Address
UART1 transmit/receive control register (Address
UART2 transmit/receive control register (Address
Notes 1: Valid when the CTS/RTS enable bit (bit 4) is “0” and CTS
Bit
0
1
2
3
4
5
6
7
2: Fix these bits to “0” in the UART mode or when serial I/O is disabled.
BRG count source select bits
CTS/RTS function select bit
Transmit register empty flag
CTS/RTS enable bit
UARTi receive interrupt mode
select bit
CLK polarity select bit
(This bit is used in the clock
synchronous serial I/O mode.)
Transfer format select bit
(This bit is used in the clock
synchronous serial I/O mode.)
Bit name
(Note 1)
(Note 2)
(Note 2)
7905 Group User’s Manual Rev.1.0
b1 b0
0 0 : Clock f
0 1 : Clock f
1 0 : Clock f
1 1 : Clock f
0 : The CTS function is selected.
1 : The RTS function is selected.
0 : Data is present in the transmit register.
1 : No data is present in the transmit register.
0 : The CTS/RTS function is enabled.
1 : The CTS/RTS function is disabled.
0 : Reception interrupt
1 : Reception error interrupt
0 : At the falling edge of the transfer clock, transmit
1 : At the falling edge of the transfer clock, transmit
0 : LSB (Least Significant Bit) first
1 : MSB (Most Significant Bit) first
(Transmission is in progress.)
(Transmission is completed.)
data is output; at the rising edge of the transfer
clock, receive data is input.
When not in transferring, pin CLKi’s level is “H.”
data is output; at the falling edge of the transfer
clock, receive data is input.
When not in transferring, pin CLKi’s level is “L.”
34
3C
B4
2
16
64
512
16
16
16
i
)
/RTS
)
)
i
separate select bit (bit 0, 1, or 4 at address AC
Function
b7 b6 b5 b4 b3 b2 b1 b0
At reset
0
0
0
1
0
0
0
0
16
R/W
) is “0.”
RW
RW
RW
RW
RW
RW
RW
RO
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