R5F21324ANSP#U1 Renesas Electronics America, R5F21324ANSP#U1 Datasheet - Page 344

• 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 314 of 583
22. Serial Interface (UART2)
The serial interface consists of three channels, UART0 to UART2. This chapter describes the UART2.
22.1
Figure 22.1
CTS2/RTS2
UART2 has a dedicated timer to generate a transfer clock and operate independently.
Figure 22.1 shows a UART2 Block Diagram. Figure 22.2 shows a Block Diagram of UART2 Transmit/Receive
Unit. Table 22.1 lists the Pin Configuration of UART2.
UART2 has the following modes:
• Clock synchronous serial I/O mode
• Clock asynchronous serial I/O mode (UART mode)
• Special mode 1 (I
• Multiprocessor communication function
RXD2
SMD2 to SMD0, CKDIR: Bits in U2MR register
CLK1, CLK0, CKPOL, CRD, CRS: Bits in U2C0 register
DF2EN: Bit in URXDF register
CLK2
f32
Clock source selection
fC
f1
f8
Overview
= 00b
= 01b
= 10b
= 11b
CLK1 to CLK0
switching
CKPOL
polarity
CTS/RTS selected
circuit
UART2 Block Diagram
Preliminary specification
Specifications in this manual are tentative and subject to change.
CLK
CKDIR
= 1
CKDIR
= 0
CRS = 0
2
C mode)
CRS = 1
Digital filter
CKDIR
internal
CKDIR
external
Clock synchronous type
(internal clock selected)
switching circuit
CTS/RTS disabled
RXD polarity
Nov 05, 2008
1/(n+1)
U2BRG
register
CRD = 0
CRD = 1
VSS
DF2EN = 0
DF2EN = 1
CTS/RTS disabled
1/16
1/16
1/2
Clock synchronous type
(external clock selected)
Clock synchronous type
(internal clock selected)
Clock synchronous type
Clock synchronous type
= 010b, 100b, 101b, 110b
= 010b, 100b, 101b, 110b
UART reception
UART transmission
n: Setting value in U2BRG register
CKDIR = 0
CKDIR = 1
= 001b
= 001b
RTS2
CTS2
SMD2 to SMD0
control circuit
Transmission
control circuit
Reception
Receive
clock
Transmit
clock
22. Serial Interface (UART2)
Transmit/
receive
unit
switching
polarity
circuit
TXD
TXD2