R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 392

• 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
18. CAN Module
The CAN (Controller Area Network) module for the R8C/22 Group, R8C/23 Group of MCUs is a communication
controller implementing the CAN 2.0B protocol. The R8C/22 Group, R8C/23 Group contains one Full CAN module
which can transmit and receive messages in both standard (11-bit) ID and extended (29-bit) ID formats.
Figure 18.1 shows a Block Diagram of CAN Module.
External CAN bus driver and receiver are required.
Figure 18.1
CTx/CRx
Protocol controller
Message box
Acceptance filter
16 bit timer
Wake up function
Interrupt generation function: The interrupt events are provided by the CAN module. CAN0 successful reception
CTx
CRx
j = 0 to 15
C0CONR register
C0RECR register
C0TECR register
Wakeup
Protocol controller
logic
Block Diagram of CAN Module
Page 370 of 501
C0STR register
C0CTLR register
: CAN I/O pins.
: This controller handles the bus arbitration and the CAN protocol services, i.e. bit
: This memory block consists of 16 slots that can be configured either as transmitter or
: This block performs filtering operation for received messages. For the filtering
: Used for the time stamp function. When the received message is stored in the message
: CAN0 wake up interrupt is generated by a message from the CAN bus.
timing, stuffing, error status etc.
receiver. Each slot contains an individual ID, data length code, a data field (8 bytes)
and a time stamp.
operation, the C0GMR register, the C0LMAR register, or the C0LMBR register is
used.
memory, the timer value is stored as a time stamp.
interrupt, CAN0 successful transmission interrupt, CAN0 error interrupt, and CAN0
wake up interrupt.
C0SSTR register
C0MCTLj register
Acceptance filter
Data bus
Data Bus
slot 0 to 15
16 bit timer
C0ICR register
C0LMAR register
C0LMBR register
C0GMR register
control logic
Interrupt
C0IDR register
CAN0 error interrupt
CAN0 wakeup interrupt
CAN0 reception
successful interrupt
CAN0 transmission
successful interrupt
Message data
Message box
Message ID
slot 0 to 15
time stamp
DLC
18. CAN Module