R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 340

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 310 of 589
21.2.7
21.2.8
After Reset
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0188h
Address 0189h
The U0SR register selects which pin is assigned to the UART0 I/O. To use the I/O pin for UART0, set this
register.
Set the U0SR register before setting the UART0 associated registers. Also, do not change the setting value in
this register during UART0 operation.
The U1SR register selects which pin is assigned to the UART1 I/O. To use the I/O pin for UART1, set this
register.
Set the U1SR register before setting the UART1 associated registers. Also, do not change the setting value in
this register during UART1 operation.
Symbol
Symbol
RXD0SEL0 RXD0 pin select bit
TXD0SEL0 TXD0 pin select bit
CLK0SEL0 CLK0 pin select bit
RXD1SEL0 RXD1 pin select bit
TXD1SEL0 TXD1 pin select bit
CLK1SEL0 CLK1 pin select bit
Bit
Symbol
Bit
Symbol
UART0 Pin Select Register (U0SR)
UART1 Pin Select Register (U1SR)
—
—
—
—
—
—
—
—
—
—
b7
b7
—
—
0
0
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Reserved bit
Reserved bit
Reserved bit
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
b6
b6
—
—
0
0
Bit Name
Bit Name
b5
—
0
b5
—
0
CLK0SEL0
CLK1SEL0
b4
0
b4
0
0: TXD0 pin not used
1: P1_4 assigned
0: RXD0 pin not used
1: P1_5 assigned
0: CLK0 pin not used
1: P1_6 assigned
0: TXD1 pin not used
1: P0_1 assigned
Set to 0.
0: RXD1 pin not used
1: P0_2 assigned
Set to 0.
0: CLK1 pin not used
1: P0_3 assigned
Set to 0.
b3
—
0
b3
—
0
RXD0SEL0
RXD1SEL0
b2
0
b2
21. Serial Interface (UARTi (i = 0 or 1))
0
Function
Function
b1
—
0
b1
—
0
TXD0SEL0
TXD1SEL0
b0
0
b0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
—
—