R5F21238JFP#U0 Renesas Electronics America, R5F21238JFP#U0 Datasheet - Page 418

• Manufacturer Part Number: R5F21238JFP#U0
• Description: IC R8C/23 MCU FLASH 64K 48LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/23r

Specifications of R5F21238JFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 64KB (64K x 8)
• 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
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 18.26
Figure 18.27
Figure 18.28
fCAN
CPU read signal
Updating period of
CAN module
CPU reset signal
C0STR register
b8: State_Reset bit
CPU read signal
Updating period of
CAN module
CPU reset signal
C0STR register
b8: State_Reset bit
CPU read signal
Updating period of
the CAN module
CPU reset signal
C0STR register
b8: State_Reset bit
0: CAN operation
1
0: CAN operation
1: CAN reset/initiall-
0: CAN operation
1: CAN reset/initiall-
: CAN reset/initial-
mode
ization mode
mode
ization mode
mode
ization mode
When Polling Period of CPU is 3fCAN or Longer
When Updating Period of CAN Module Matches Access Period from CPU
With a Wait Time of 3fCAN Before CPU Read
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Wait time
: Updated without fail in period of 3fCAN
: When the CAN module’s State_Reset bit updating period matches the CPU’s read
: When the CAN module’s State_Reset bit updating period matches the CPU’s read
: Updated without fail in period of 4fCAN
period, it does not enter reset mode, for the CPU read has the higher priority.
period, it does not enter reset mode, for the CPU read has the higher priority.
4fCAN
18. CAN Module