r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 235

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
14.5.6
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 002AEh
The U_0SR register is used to select which pin is assigned to the UART0_0 I/O. To use the I/O pin for
UART0_0, set this register.
Set the U_0SR register before setting the registers associated with UART0_0. Also, do not change the set value
of this register during UART0_0 operation.
Symbol
RXD_0SEL
TXD_0SEL
CLK_0SEL
Bit
UART0_0 Pin Select Register (U_0SR)
Symbol
—
—
—
—
—
Preliminary document
Specifications in this document are tentative and subject to change.
b7
—
0
TXD_0 pin select bit
Nothing is assigned. The write value must be 0. The read value is 0.
RXD_0 pin select bit
Nothing is assigned. The write value must be 0. The read value is 0.
CLK_0 pin select bit
Nothing is assigned. The write value must be 0. The read value is 0.
b6
—
0
Bit Name
b5
—
0
CLK_0SEL
b4
0
0: TXD_0 pin not used
1: P1_4 assigned
0: RXD_0 pin not used
1: P1_5 assigned
0: CLK_0 pin not used
1: P1_6 assigned
b3
—
0
RXD_0SEL
b2
0
Function
b1
—
0
TXD_0SEL
b0
0
Page 204 of 725
14. I/O Ports
R/W
R/W
R/W
R/W
—
—
—