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UART0 transmit/receive mode register (Address 30
UART1 transmit/receive mode register (Address 38
b7
0
UART0 transmit/receive control register 0 (Address 34
UART1 transmit/receive control register 0 (Address 3C
b7
UART0 baud rate register (BRG0) (Address 31
UART1 baud rate register (BRG1) (Address 39
b7
UART0 transmit interrupt control register (Address 71
UART1 transmit interrupt control register (Address 73
b7
Fig. 7.3.1 Initial setting example for relevant registers when transmitting
)
16
)
16
b0
0
0
1
Clock synchronous serial I/O mode
Internal/External clock select bit
0: Internal clock
1: External clock
: It may be either "0" or "1."
)
16
)
16
b0
BRG count source select bits
b1 b0
0 0 : f
/f
2
4
0 1 : f
/f
16
32
1 0 : f
/f
64
128
1 1 : f
/f
512
1024
/
select bit
CTS
RTS
0:
function selected.
CTS
1:
function selected (
function disabled).
RTS
CTS
Transfer format select bit
0: LSB first
1: MSB first
)
16
)
16
b0
Set to "00
" to "FF
."
16
16
Necessary only when internal clock is
selected.
)
16
)
16
b0
Interrupt priority level select bits
When using interrupts, set these bits to
level 1- 7. When disabling interrupts, set
these bits to level 0.
7751 Group User's Manual
7.3 Clock synchronous serial I/O mode
UART0 transmit buffer register (Address 32
UART1 transmit buffer register (Address 3A
b7
UART0 transmit/receive control register 1 (Address 35
UART1 transmit/receive control register 1 (Address 3D
b7
Transmission starts.
(In the case of selecting the
when the
pin's input level is "L.")
CTS
i
SERIAL I/O
)
16
)
16
b0
Set transmit data here.
)
16
)
16
b0
1
Transmit enable bit
1: Transmission enabled
function, transmission starts
CTS
7–21
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