Renesas M16C Series User Manual page 231
16-bit single-chip microcomputer
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M30240 Group
Setting UARTi bit rate generator
b7
Note: Write to UARTi bit rate generator when transmission/reception is halted.
Transmission enabled
b7
Writing transmit data
(b15)
b7
Checking the status of UARTi transmit buffer register (i = 0, 1)
b7
Writing next transmit data
(b15)
b7
Figure 2.64: Set-up procedure of transmission in UART mode (2)
Rev.1.00 Sep 24, 2003 Page 213 of 360
Continued from the previous page
(i = 0 to 2)
b0
UARTi bit rate generator (i = 0 to 2) [Address 03A1
UiBRG (i = 0 to 2)
Can be set from 00
to FF
(Note)
16
16
UART0 transmit/receive control register 1
b0
U0C1 [Address 03A5
]
16
1
UART1 transmit/receive control register 1
U1C1 [Address 03AD
]
16
Transmit enable bit
1 : Transmission enabled
(b8)
UART0 transmit buffer register [Address 03A3
b0 b7
b0
UART1 transmit buffer register [Address 03AB
UART2 transmit buffer register [Address 037B
Setting transmission data
When CTSi input level = "L"
Start transmission
UART0 transmit/receive control register 1
b0
U0C1 [Address 03A5
]
16
UART1 transmit/receive control register 1
U1C1 [Address 03AD
]
16
Transmit buffer empty flag
0 : Data present in transmit
buffer register
1 : No data present in transmit
buffer register
(Writing next transmit data enabled)
(b8)
UART0 transmit buffer register [Address 03A3
b0 b7
b0
UART1 transmit buffer register [Address 03AB
UART2 transmit buffer register [Address 037B
Setting transmission data
Transmission is complete
Clock-Asynchronous Serial I/O
, 03A9
, 0379
]
16
16
16
b7
b0
UART2 transmit/receive control register 1
1
U2C1 [Address 037D
Transmit enable bit
1 : Transmission enabled
, 03A2
] U0TB
16
16
, 03AA
] U1TB
16
16
, 037A
] U2TB
16
16
b7
b0
UART2 transmit/receive control register 1
U2C1 [Address 037D
Transmit buffer empty flag
0 : Data present in transmit
buffer register
1 : No data present in transmit
buffer register
(Writing next transmit data enabled)
, 03A2
] U0TB
16
16
, 03AA
] U1TB
16
16
, 037A
] U2TB
16
16
]
16
]
16
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