R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 309

• 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 15.5
i = 0 or 1
NOTES:
Table 15.6
UiTB
UiRB
UiBRG
UiMR
UiC0
UiC1
TXD0(P1_4)
RXD0(P1_5)
CLK0(P1_6)
TXD1(P6_6)
RXD1(P6_7)
Table 15.6 lists the I/O Pin Functions in UART Mode. After the UARTi (i = 0 or 1) operating mode is selected, the
TXDi pin outputs “H” level (if the NCH bit is set to 1 (N-channel open-drain outputs), this pin is in a high-
impedance state) until transfer starts.
1. The bits used for transmit/receive data are as follows: Bits 0 to 6 when transfer data is 7-bit long; bits
2. The following bits are undefined: Bits 7 and 8 when transfer data is 7 bits long; bit 8 when transfer
3. External clock can be selected in UART0 only.
Pin name
Register
0 to 7 when transfer data is 8-bit long; bits 0 to 8 when transfer data is 9-bit long.
data is 8 bits long.
Registers Used and Settings for UART Mode
I/O Pin Functions in UART Mode
0 to 8
0 to 8
OER,FER,PER,SUM
0 to 7
SMD2 to SMD0
CKDIR
STPS
PRY, PRYE
CLK0, CLK1
TXEPT
NCH
CKPOL
UFORM
TE
TI
RE
RI
UiIRS
UiRRM
Output serial data
Input serial data
Programmable I/O port The CKDIR bit in the U0MR register = 0
Input transfer clock
Output serial data
Input serial data
Page 287 of 501
Function
Bit
Set transmit data
Receive data can be read
Error flag
Set a bit rate
Set to 100b when transfer data is 7-bit long
Set to 101b when transfer data is 8-bit long
Set to 110b when transfer data is 9-bit long
Select the internal clock or external clock
Select the stop bit
Select whether parity is included and odd or even
Select the count source for the UiBRG register
Transmit register empty flag
Select TXDi pin output mode
Set to 0
LSB first or MSB first can be selected when transfer data is 8-bit
long. Set to 0 when transfer data is 7- or 9-bit long.
Set to 1 to enable transmit
Transmit buffer empty flag
Set to 1 to enable receive
Receive complete flag
Select the UARTi transmit interrupt source
Set to 0
(Cannot be used as a port 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 = 1
The PD1_6 bit in the PD1 register = 0
U1PINSEL bit in PMR register = 1
(Cannot be used as a port when performing receive only)
U1PINSEL bit in PMR register = 1
The PD6_7bit in the PD6 register = 0
(P6_7 can be used as an input port when performing transmit
only)
(1)
Selection Method
(1, 2)
Function
(3)
15. Serial Interface