Txd10/Rxd1 Select Function (Uart1); Txd11 Select Function (Uart1) - Renesas M16C FAMILY Hardware Manual

Under development Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/11 Group
• Example of receive timing when transfer data is 8 bits long (parity disabled, one stop bit)
UiBRG count
source
"1"
UiC1 register
RE bit
"0"
RxDi
Transfer clock
"1"
UiC1 register
RI bit
"0"
"1"
SiRIC register
IR bit
"0"
The above timing diagram applies to the case where the register bits are set as follows:
• UiMR register PRYE bit = 0 (parity disabled)
• UiMR register STPS bit = 0 (1 stop bit)
i = 0, 1
Figure 13.10 Receive Operation
13.2.1 TxD /RxD
10
P3 can be used as TxD
7
register. P3 is used as TxD
7
input pin if set to "0" (RxD
13.2.2 TxD Select Function (UART1)
11
P0 can be used as TxD
0
P0 is used as TxD
0
to "0" (P0 ).
0
Rev.0.91 2003 Sep 08
Start bit
Sampled "L"
Reception triggered when transfer clock
is generated by falling edge of start bit
Select Function (UART1)
1
output pin or RxD
10
output pin if the TXD1EN bit is set to "1" (TxD
10
).
1
output pin or a port by selecting with the TXD1SEL bit in the UCON register.
11
output pin if the TXD1SEL bit is set to "1" (TxD
11
page 122 of 184
13.2 Clock Asynchronous Serial I/O (UART) Mode
D D
0 1
Receive data taken in
Transferred from UARTi receive
register to UiRB register
Set to "0" when interrupt request is accepted, or set by a program
input pin by selecting with the TXD1EN bit in the UCON
1
Stop bit
D
7
(GA 13 UM60)
) and used as RxD
10
) and used as an I/O port if set
11
1