R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 467

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#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: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K 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: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 434 of 723
22. Serial Interface (UARTi (i = 0 or 1))
The serial interface consists of three channels, UART0 to UART2. This chapter describes the UARTi (i = 0 or 1).
22.1
Figure 22.1
UARTi
RXDi
CLKi
UART0 and UART 1 have a dedicated timer to generate a transfer clock and operate independently. UART0 and
UART1 support clock synchronous serial I/O mode and clock asynchronous serial I/O mode (UART mode).
Figure 22.1 shows a UARTi (i = 0 or 1) Block Diagram. Figure 22.2 shows a Block Diagram of UARTi
Transmit/Receive Unit. Table 22.1 lists the Pin Configuration of UARTi (i = 0 or 1).
CLK1 and CLK0 = 00b
f32
fC
f1
f8
Overview
= 01b
= 10b
= 11b
polarity
switch
circuit
CLK
UARTi (i = 0 or 1) Block Diagram
Clock synchronous type
(internal clock selected)
CKDIR = 0
Internal
External
CKDIR = 1
UiBRG register
1/(n0+1)
1/16
1/16
1/2
Clock synchronous type
Clock synchronous type
Clock synchronous type
(internal clock selected)
Clock synchronous type
(external clock selected)
UART reception
UART transmission
Reception control
Transmission
control circuit
CKDIR = 0
CKDIR = 1
circuit
CKDIR: Bit in UiMR register
CLK0, CLK1: Bits in UiC0 register
i = 0 or 1
22. Serial Interface (UARTi (i = 0 or 1))
Receive clock
Transmit clock
Transmit/
receive
unit
TXDi