R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 384

• 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
Figure 17.7
17.4.2
IR bit in the TRAIC
RXDSF flag in the
SBDCT flag in the
SFDCT flag in the
Figure 17.7 shows a Typical Operation when Receiving a Header Field. Figure 17.8 through Figure 17.10 show
an Example of Header Field Reception Flowchart.
When receiving a header field, the hardware LIN operates as described below.
LINCR register
RXD0 input for
LINST register
LINST register
(1) Synch Break detection is enabled by writing 1 to the LSTART bit in the LINCR register of the hardware
(2) When a low-level signal is input for a duration equal to or greater than the period set in timer RA, the
(3) The hardware LIN receives a Synch Field (55h). At this time, it measures the period of the start bit and
(4) The hardware LIN sets the SFDCT flag in the LINST register to 1 when it finished measuring the Synch
(5) After it finished measuring the Synch Field, the hardware LIN calculates a transfer rate from the count
(6) The hardware LIN performs communication for a response field after it finished receiving the ID field.
RXD0 pin
Slave Mode
• When LINE bit = 1 (Causes LIN to start operating), MST bit = 0 (Slave mode), SBIE bit = 1
LIN.
hardware LIN detects it as Synch Break. At this time, the SBDCT flag in the LINST register is set to 1.
Furthermore, if the SBIE bit in the LINCR register is set to 1, the hardware LIN generates a timer RA
interrupt. Then it goes to Synch Field measurement.
bits 0 to 6 by using timer RA. In this case, it is possible to select whether to input the Synch Field signal
to RxD0 of UART0 by setting the SBE bit in the LINCR register accordingly.
Field. Furthermore, if the SFIE bit in the LINCR register is set to 1, it generates a timer RA interrupt.
value of timer RA and sets the result in UART0 and sets the TRAPRE and TRA registers of the timer
RA back again. Then it receives an ID field via UART0.
register
UART0
(Enables Synch Break detection interrupt), SFIE bit = 1 (Enables Synch Field measurement
completed interrupt)
Typical Operation when Receiving a Header Field
1
0
1
0
1
0
1
0
1
0
1
0
Page 362 of 501
(1)
Set by writing 1 to
the LSTART bit in
the LINCR register
Synch Break
(2)
(3)
Measure this period
Set by writing 1 to
the B1CLR bit in
the LINST register
Cleared to 0 upon
acceptance of
interrupt request or
by a program
Synch Field
(4)
(5)
Set by writing 1 to the
B0CLR bit in the LINST
register
Cleared to 0 when Synch
Field measurement
finishes
IDENTIFIER
17. Hardware LIN
(6)