M30218_01 Datasheet, PDF (250/469 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

Clock-Synchronous Serial I/O
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Continued from the previous page
Setting UARTi bit rate generator (i = 0, 1)
b7
b0
UARTi bit rate generator (i = 0, 1) [Address 03A1 16, 03A916]
UiBRG (i = 0, 1)
Can be set to 0016 to FF16 (Note)
Note: Write to UARTi bit rate generator when transmission/reception is halted.
Transmission enabled
b7
b0 ^{UART0 transmit/receive control register 1}
1
U0C1 [Address 03A5 16]
UART1 transmit/receive control register 1
U1C1 [Address 03AD 16]
Transmit enable bit
1 : Transmission enabled
Writing transmit data
(b15)
b7
(b8)
b0 b7
b0
UART0 receive buffer register [Address 03A3 16, 03A216] U0TB
UART1 receive buffer register [Address 03AB 16, 03AA16] U1TB
Setting transmission data
When CTSi input level = “L”
Start transmission
Checking the status of UARTi transmit /receive control register (i = 0, 1)
UART0 transmit/receive control register 1
b7
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)
Writing next transmit data
(b15)
b7
(b8)
b0 b7
b0
UART0 transmit buffer register [Address 03A3 16, 03A216] U0TB
UART1 transmit buffer register [Address 03AB 16, 03AA16] U1TB
Setting transmission data
Transmission is complete
Figure 2.4.7. Set-up procedure of transmission in clock-synchronous serial I/O mode (2)
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