R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 1028

• Manufacturer Part Number: R0K572030S000BE
• Description: KIT DEV FOR SH7203
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572030S000BE

• Contents: CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
• Silicon Manufacturer: Renesas
• Kit Contents: Board
• Silicon Family Name: SH7203
• Silicon Core Number: R5S72030W200FP
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: SH7203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SH7203
• Lead Free Status / Rohs Status: Compliant

Section 19 Controller Area Network (RCAN-TL1)
The RCAN-TL1 has two state machines. One is for transmission, and the other is for reception.
1-1:
1-2:
2-1:
2-2:
3-1:
3-2:
Internal arbitration for the next transmission is also performed at the beginning of each error
delimiter in case of an error is detected on the CAN Bus. It is also performed at the beginning of
error delimiters following overload frame.
As the arbitration for transmission is performed at CRC delimiter, in case a remote frame request
is received into a Mailbox with ATX = 1 the answer can join the arbitration for transmission only
at the following Bus Idle, CRC delimiter or Error Delimiter.
Depending on the status of the CAN bus, following the assertion of the TXCR, the corresponding
Message abortion can be handled with a delay of maximum 1 CAN Frame.
Rev. 3.00 Sep. 28, 2009 Page 996 of 1650
REJ09B0313-0300
scheduler state
Error/Arb-Lost
TXPR/TXCR/
RCAN-TL1
Scheduler
start point
CAN bus
Set Point
state
When a TXPR bit(s) is set while the CAN bus is idle, the internal arbitration starts running
immediately and the transmission is started.
Operations for both transmission and reception starts at SOF. Since there is no reception
frame, RCAN-TL1 becomes transmitter.
At crc delimiter, internal arbitration to search next message transmitted starts.
Operations for both transmission and reception starts at SOF. Because of a reception frame
with higher priority, RCAN-TL1 becomes receiver. Therefore, Reception is carried out
instead of transmitting Frame-3.
At crc delimiter, internal arbitration to search next message transmitted starts.
Operations for both transmission and reception starts at SOF. Since a transmission frame
has higher priority than reception one, RCAN-TL1 becomes transmitter.
Bus Idle
1-1
Interm:
SOF:
EOF:
Message:
Tx Arb for
Frame-1
Figure 19.17 Internal Arbitration for transmission
SOF
Tx/Rx Arb for
Intermission Field
Start Of Frame
End Of Frame
Arbitration + Control + Data + CRC + Ack Field
Frame-1
1-2
Transmission
Message
Frame-1
Tx Arb for
Frame-3
2-1
EOF Interm
SOF
Tx/Rx Arb for
Frame-3/2
2-2
Reception
Message
Frame-2
Tx Arb for
Frame-3
3-1
EOF Interm
Transmission
SOF
Tx/Rx Arb for
Frame-3
Frame-3
3-2