R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 411

• 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
18.8
Figure 18.22
When write
The ASU is a function to determine whether the receive ID is valid or not by means of a table search. To use this
function, first register the ID to receive in the data table. Next, store the received ID in the C0AFS register, read
out the decoded received ID from the C0AFS register and check it by searching the table. The ASU can only be
used for the IDs of standard frames.
The ASU will prove effective in the following cases.
Figure 18.22 shows the Content of C0AFS Register When Written to and Read out (For Word Access).
When read
•
•
When the IDs to receive cannot be masked by the acceptance filter.
(Example) IDs to receive: 078h, 087h, 111h
When there are too many IDs to receive and filtering in software requires an excessive amount of time.
Acceptance Filter Support Unit (ASU)
b15
b15
Content of C0AFS Register When Written to and Read out (For Word Access)
Page 389 of 501
SID10 SID9 SID8 SID7 SID6
3/8 Decoder
b8 b7
b8 b7
SID10
SID9
SID5 SID4 SID3 SID2 SID1 SID0
SID8 SID7 SID6 SID5 SID4 SID3
18. CAN Module
b0
b0
Address
1343h,
1342h
1343h,
1342h
CAN0