R5F21324ANSP#U1 Renesas Electronics America, R5F21324ANSP#U1 Datasheet - Page 328

• Manufacturer Part Number: R5F21324ANSP#U1
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Ar

Specifications of R5F21324ANSP#U1

• 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: 15
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Under development
R8C/32A Group
REJ09B0458-0020 Rev.0.20
Page 298 of 583
21.2.7
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0188h
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.
Symbol
RXD0SEL0 RXD0 pin select bit
TXD0SEL0 TXD0 pin select bit
CLK0SEL0 CLK0 pin select bit
Bit
Symbol
UART0 Pin Select Register (U0SR)
—
—
—
—
—
Preliminary specification
Specifications in this manual are tentative and subject to change.
b7
—
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.
b6
—
0
Nov 05, 2008
Bit Name
b5
—
0
CLK0SEL0
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
b3
—
0
RXD0SEL0
b2
0
Function
b1
—
0
21. Serial Interface (UART0)
TXD0SEL0
b0
0
R/W
R/W
R/W
R/W
—
—
—