R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 409

• 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
18.6.2
Table 18.2
NOTE:
Calculation of Baud Rate
1. The number in ( ) indicates a value of fCAN division value multiplied by division value of the baud
Baud rate depends on system clock, the division value of the CAN module system clock, the division value of
the baud rate prescaler, and the number of Tq’s in one bit.
Table 18.2 shows the Examples of Baud Rate.
Baud Rate
83.3 kbps
33.3 kbps
500 kbps
125 kbps
rate prescaler.
1 Mbps
NOTES:
1. fCAN division value = 1, 2, 4, 8, 16
2. Division value of prescaler for baud rate = P + 1 (P: 0 to 15)
Baud Rate
2 x fCAN division value
fCAN division value: a value selected in the CCLKR register
P: a value selected by the BRP bit in the C0CONR register
Examples of Baud Rate
Page 387 of 501
10Tq (12)
10Tq (30)
20Tq (15)
10Tq (1)
10Tq (2)
20Tq (1)
8Tq (10)
10Tq (8)
16Tq (5)
20Tq (4)
8Tq (15)
20Tq (6)
20 MHz
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(1)
x division value of baud rate prescaler
10Tq (24)
16Tq (15)
20Tq (12)
16Tq (1)
16Tq (4)
8Tq (12)
16Tq (6)
8Tq (30)
16 MHz
8Tq (1)
8Tq (2)
8Tq (8)
XIN
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10Tq (15)
(2)
10Tq (1)
10Tq (4)
20Tq (2)
10Tq (6)
20Tq (3)
10 MHz
8Tq (5)
x number of Tq’s in one bit
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10Tq (12)
16Tq (2)
16Tq (3)
8Tq (15)
20Tq (6)
8Tq (1)
8Tq (4)
8Tq (6)
18. CAN Module
8 MHz
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