R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 413

• 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
18.12 Reception and Transmission
Table 18.3
TrmReq
Configuration of CAN Reception and Transmission Mode
Table 18.3 shows Configuration of CAN Reception and Transmission Mode.
TrmReq, RecReq, Remote, RspLock, RemActive, RspLock: C0MCTLi register’s (i = 0 to 15) bit
When configuring a slot as a reception slot, note the following points.
When configuring a slot as a transmission slot, note the following points.
(1) Before configuring a slot as a reception slot, be sure to set the C0MCTLi registers (i = 0 to 15) to 00h.
(2) A received message is stored in a slot that matches the condition first according to the result of reception
(3) In normal CAN operation mode, when a CAN module transmits a message of which ID matches, the CAN
(1) Before configuring a slot as a transmission slot, be sure to set the C0MCTLi registers to 00h.
(2) Set the TrmReq bit to 0 (not transmission slot) before rewriting a transmission slot.
(3) A transmission slot should not be rewritten when the TrmActive bit is 1 (transmitting). If it is rewritten, an
0
0
1
1
0
mode configuration and acceptance filtering operation. Upon deciding in which slot to store, the smaller the
number of the slot is, the higher priority it has.
module never receives the transmitted data. In loop back mode, however, the CAN module receives back
the transmitted data. In this case, the module does not return an ACK.
indeterminate data will be transmitted.
RecReq
Configuration of CAN Reception and Transmission Mode
0
1
0
0
1
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Remote
-----
0
1
0
1
RspLock
1/0
-----
0
0
0
Communication environment configuration mode:
configure the communication mode of the slot.
Configured as a reception slot for a data frame.
Configured as a transmission slot for a remote frame. (At
this time the RemActive bit is 1.)
After completion of transmission, this functions as a
reception slot for a data frame. (At this time the RemActive
bit is 0.)
However, when an ID that matches on the CAN bus is
detected before remote frame transmission, this
immediately functions as a reception slot for a data frame.
Configured as a transmission slot for a data frame.
Configured as a reception slot for a remote frame. (At this
time the RemActive bit is 1.)
After completion of reception, this functions as a
transmission slot for a data frame. (At this time the
RemActive bit is 0.)
However, transmission does not start as long as RspLock
bit remains 1; thus no automatic remote frame response.
Response (transmission) starts when RspLock bit is set to
0.
Communication Mode of the Slot
18. CAN Module