R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 304

• Manufacturer Part Number: R5F21238DFP#U0
• Description: IC R8C/23 MCU FLASH 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/23r

Specifications of R5F21238DFP#U0

• Core Size: 16/32-Bit
• Program Memory Size: 64KB (64K x 8)
• Peripherals: POR, Voltage Detect, WDT
• Core Processor: R8C
• Speed: 20MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Number Of I /o: 41
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• No. Of I/o's: 41
• Ram Memory Size: 3KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Embedded Interface Type: CAN, I2C, UART
• Rohs Compliant: Yes
• Cpu Family: R8C
• Device Core Size: 16b
• Frequency (max): 20MHz
• Interface Type: I2C/UART
• Total Internal Ram Size: 3KB
• # I/os (max): 41
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 12-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Table 15.2
NOTE:
Table 15.3
U0TB
U0RB
U0BRG
U0MR
U0C0
U0C1
TXD0(P1_4)
RXD0(P1_5)
CLK0(P1_6)
Table 15.3 lists the I/O Pin Functions in Clock Synchronous Serial I/O Mode. The TXD0 pin outputs “H” level
between the operating mode selection of UART0 and transfer start, an “H” (If the NCH bit is set to 1 (the N-
channel open-drain output), this pin is in a high-impedance state.)
Pin Name
1. Set bits which are not in this table to 0 when writing to the registers in clock synchronous serial I/O
Register
mode.
Registers Used and Settings in Clock Synchronous Serial I/O Mode
I/O Pin Functions in Clock Synchronous Serial I/O Mode
Output serial data
Input serial data
Output transfer clock
Input transfer clock
0 to 7
0 to 7
OER
0 to 7
SMD2 to SMD0
CKDIR
CLK1 to CLK0
TXEPT
NCH
CKPOL
UFORM
TE
TI
RE
RI
U0IRS
U0RRM
Function
Page 282 of 501
Bit
Set transmit data
Receive data can be read
Overrun error flag
Set bit rate
Set to 001b
Select the internal clock or external clock
Select the count source in the U0BRG register
Transmit register empty flag
Select TXD0 pin output mode
Select the transfer clock polarity
Select the LSB first or MSB first
Set this bit to 1 to enable transmit/receive
Transmit buffer empty flag
Set this bit to 1 to enable reception
Reception complete flag
Select the UART0 transmit interrupt source
Set this bit to 1 to use continuous receive mode
(Outputs dummy data when performing receive only)
The PD1_5 bit in the PD1 register = 0
(P1_5 can be used as an input port when performing transmit
only)
The CKDIR bit in the U0MR register = 0
The CKDIR bit in the U0MR register = 1
PD1_6 bit in PD1 register = 0
Selection Method
Function
(1)
15. Serial Interface