R5F21324ANSP#U1 Renesas Electronics America, R5F21324ANSP#U1 Datasheet - Page 364

• 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 334 of 583
Table 22.7
TXD2
(P3_4 or P3_7)
RXD2
(P3_4, P3_7, or
P4_5)
CLK2 (P3_5)
CTS2/RTS2
(P3_3)
Table 22.7 lists the I/O Pin Functions in UART Mode.
Note that for a period from when the UART2 operating mode is selected to when transfer starts, the TXD2 pin
outputs “H”. (When N-channel open-drain output is selected, this pin is in the high-impedance state.)
Figure 22.7 shows the Transmit Timing in UART Mode. Figure 22.8 shows the Receive Timing in UART Mode.
Pin Name
Preliminary specification
Specifications in this manual are tentative and subject to change.
I/O Pin Functions in UART Mode
Serial data output
Serial data input
I/O port
Transfer clock input
CTS input
RTS output
I/O port
Function
Nov 05, 2008
• When TXD2 (P3_4)
• When TXD2 (P3_7)
• For reception only:
• When RXD2 (P3_4)
• When RXD2 (P3_7)
• When RXD2 (P4_5)
• For transmission only:
CLK2SEL0 bit in U2SR1 register = 0
CLK2SEL0 bit in U2SR1 register = 1
CKDIR bit in U2MR register = 1
PD3_5 bit in PD3 register = 0
CTS2SEL0 bit in U2SR1 register = 1
CRD bit in U2C0 register = 0
CRS bit in U2C0 register = 0
PD3_3 bit in PD3 register = 0
CTS2SEL0 bit in U2SR1 register = 1
CRD bit in U2C0 register = 0
CRS bit in U2C0 register = 1
CTS2SEL0 bit in U2SR1 register = 0
Bits TXD2SEL1 to TXD2SEL0 in U2SR0 register = 10b (P3_4)
Bits TXD2SEL1 to TXD2SEL0 in U2SR0 register = 01b (P3_7)
P3_4 and P3_7 can be used as ports by setting TXD2SEL1 to
TXD2SEL0 to 00b.
Bits RXD2SEL1 to RXD2SEL0 in U2SR0 register = 01b (P3_4)
Bits RXD2SEL1 to RXD2SEL0 in U2SR0 register = 10b (P3_7)
PD3_7 bit in PD3 register = 0
Bits RXD2SEL1 to RXD2SEL0 in U2SR0 register = 11b (P4_5)
PD4_5 bit in PD4 register = 0
P3_4, P3_7, and P4_5 can be used as ports by setting
RXD2SEL1 to RXD2SEL0 to 00b.
Selection Method
22. Serial Interface (UART2)