R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 399

• Manufacturer Part Number: R5F21256SNFP#U0
• Description: IC R8C MCU FLASH 32K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21256SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 17.12
17.4.4
Timer RA
Timer RA
UART0 Complete transmission via UART0
Hardware LIN
Hardware LIN
Figure 17.12 shows an Example of Hardware LIN Communication Completion Flowchart.
Use the following timing for hardware LIN end processing:
• If the hardware bus collision detection function is used
• If the bus collision detection function is not used
Perform hardware LIN end processing after checksum transmission completes.
Perform hardware LIN end processing after header field transmission and reception complete.
Feb 29, 2008
Hardware LIN End Processing
Set the timer to stop counting
TSTART bit in TRACR register ← 0
Read the count status flag
TCSTF flag in TRACR register
Example of Hardware LIN Communication Completion Flowchart
Clear the status flags
(Bus collision detection, Synch Break
detection, Synch Field measurement)
Bits B2CLR, B1CLR, B0CLR in the LINST
register ← 1
Set the LIN operation to stop
LINE bit in the LINCR register ← 0
Page 380 of 485
TCSTF = 0 ?
YES
NO
Set the timer to stop counting.
Zero to one cycle of the timer
RA count source is required
after timer RA starts counting
before the TCSTF flag is set to
1.
When the bus collision
detection function is not used,
end processing for the UART0
transmission is not required.
After clearing hardware LIN
status flag, stop the
hardware LIN operation.
17. Hardware LIN