r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 236

• 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
14.5.7
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 002AFh
The U_1SR register is used to select which pin is assigned to the UART0_1 I/O. To use the I/O pin for
UART0_1, set this register.
Set the U_1SR register before setting the registers associated with UART0_1. Also, do not change the set value
of this register during UART0_1 operation.
Symbol
RXD_1SEL0 RXD_1 pin select bits
RXD_1SEL1
TXD_1SEL0 TXD_1 pin select bits
TXD_1SEL1
CLK_1SEL0 CLK_1 pin select bits
CLK_1SEL1
Bit
UART0_1 Pin Select Register (U_1SR)
Symbol
—
—
Preliminary document
Specifications in this document are tentative and subject to change.
b7
—
0
Nothing is assigned. The write value must be 0. The read value is 0.
b6
—
0
CLK_1SEL1 CLK_1SEL0 RXD_1SEL1 RXD_1SEL0 TXD_1SEL1 TXD_1SEL0
Bit Name
b5
0
b4
0
b1 b0
b3 b2
b5 b4
0 0: TXD_1 pin not used
0 1: P0_1 assigned
1 0: P6_3 assigned
1 1: Do not set.
0 0: RXD_1 pin not used
0 1: P0_2 assigned
1 0: P6_4 assigned
1 1: Do not set.
0 0: CLK_1 pin not used
0 1: P0_3 assigned
1 0: P6_2 assigned
1 1: P6_5 assigned
b3
0
Function
b2
0
b1
0
Page 205 of 725
14. I/O Ports
b0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—