R01UH0136EJ0210 Rev.2.10
Page 481 of 800
Jul 31, 2012
M16C/64A Group
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
Figure 23.13 Receive Timing in UART Mode
D0
D1
D7
Start bit
Reception triggered when transmit/receive
clock is generated by falling edge of start bit.
Sampled as low
Receive data taken in
Clock divided
by UiBRG
RE bit in
UiC1 register
RXDi
Transmit/
receive clock
RI bit in
UiC1 register
RTSi
Stop bit
1
0
0
1
High
Low
IR bit in
SiRIC register
0
1
Set to 0 by an interrupt request
acknowledgment or by a program.
Transferred from UARTi receive register
to UiRB register.
Example of Receive Timing When Character Bit Length is 8 Bits
(Parity Disabled, 1 Stop Bit)
i = 0 to 2, 5 to 7
The above assumes the following:
• The PRYE bit in the UiMR register is 0 (parity disabled).
• The STPS bit in the UiMR register is 0 (1 stop bit).
• The CRD bit in the UiC0 register is 0 (
CTSi
/
RTSi
enabled)
• The CRS bit in the UiC0 register is 1 (
RTSi
selected)
Содержание M16C/60 Series
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