M16C62_M Datasheet, PDF (406/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

UART
Example of wiring
Microcomputer
RXDi
RTSi
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Transmitter side IC
TXD
Port
Example of operation
BRGi's count
source
Receive enable
bit (RE)
RxDi
(1) Reception enabled
(2) Start reception
“1”
“0”
Start bit
Sampled “L”
Transfer clock
(4) Data is
read
(3) Receiving is
completed
D0
D1
D7 _{Stop bit}
Receive data taken in
Receive
“1”
complete flag
(RI)
“0”
RTSi
“H”
“L”
Receive interrupt _{“1”}
request bit
“0”
(IR)
Reception started when transfer
clock is generated by falling edge
of start bit
Transferred from UARTi receive register
to UARTi receive buffer register
Cleared to “0” when interrupt request is accepted, or cleared by software
Timing of transfer data 8 bits long applies to the following settings :
•Transfer data length is 8 bits.
•Parity is disabled.
•One stop bit
•RTS function is selected.
Figure 2.5.11. Operation timing of reception in UART mode
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