Renesas R8C/18 Series Hardware Manual page 166

R8C/18 Group, R8C/19 Group
UARTi Transmit/Receive Control Register 1 (i = 0 or 1)
b7 b6 b5 b4 b3 b2 b1 b0
NOTE:
1. The RI bit is set to 0 w hen the higher byte of the UiRB register is read out. Set the PD1_6 bit in the PD1 register to 0
(input).
UART Transmit/Receive Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0 0
NOTE:
1. The CNTRSEL bit selects the input pin of the CNTR0 (INTI
When the CNTR0 signal is output, it is output from the CNTR00 pin regardless of the CNTRSEL bit setting.
Figure 15.6 Registers U0C1 to U1C1, and UCON
Rev.1.30 Apr 14, 2006
REJ09B0222-0130
Symbol Address
U0C1 00A5h
U1C1 00ADh
Bit Symbol Bit Name
Transmit enable bit
TE
Transmit buffer empty flag
TI
Receive enable bit
RE
Receive complete flag
RI
— Nothing is assigned. If necessary, set to 0.
(b7-b4) When read, the content is 0.
Symbol Address
00B0h
UCON
Bit Symbol Bit Name
UART0 transmit interrupt
U0IRS
source select bit
UART1 transmit interrupt
U1IRS
source select bit
UART0 continuous receive
U0RRM
mode enable bit
— Reserved bit
(b3)
UART1 pin (P3_7/TXD1,
P4_5/RXD1) select bits
U1SEL0
U1SEL1
— Reserved bit
(b6)
CNTR0 signal pin select bit
CNTRSEL
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0 : Disables transmission.
1 : Enables transmission.
0 : Data in UiTB register
1 : No data in UiTB register
0 : Disables reception.
1 : Enables reception.
(1)
0 : No data in UiRB register
1 : Data in UiRB register
0 : Transmit buffer empty (TI = 1)
1 : Transmit completed (TXEPT = 1)
0 : Transmit buffer empty (TI = 1)
1 : Transmit completed (TXEPT = 1)
0 : Disables continuous receive mode.
1 : Enables continuous receive mode.
Set to 0.
b5 b4
0 0 : P3_7, P4_5
0 1 : P3_7, RXD1
1 0 : Do not set.
1 1 : TXD1, RXD1
Set to 0.
(1)
0 : P1_5/RXD0
______
P1_7/CNTR00/INT10
1 : P1_5/RXD0/CNTR01/INT11
P1_7
____
) signal.
15. Serial Interface
After Reset
02h
02h
Function
After Reset
00h
Function
______
RW
RW
RO
RW
RO
—
RW
RW
RW
RW
RW
RW
RW
RW
RW