R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 1027

• 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

19.4.3
• Message Transmission Request
The following sequence is an example to transmit a CAN frame onto the bus. As described in the
previous register section, please note that IRR8 is set when one of the TXACK or ABACK bits is
set, meaning one of the Mailboxes has completed its transmission or transmission abortion and is
now ready to be updated for the next transmission, whereas, the GSR2 means that there is
currently no transmission request made (No TXPR flags set).
• Internal Arbitration for transmission
The following diagram explains how RCAN-TL1 manages to schedule transmission-requested
messages in the correct order based on the CAN identifier. ‘Internal arbitration’ picks up the
highest priority message amongst transmit-requested messages.
Message Transmission Sequence
RCAN-TL1 is in Tx_Rx Mode
Write '1' to the TXPR[x] bit
Update Message Data of
at any desired time
'x' Highest Priority?
Transmission Start
Internal Arbitration
(MBC[x] = 0)
Mailbox[x]
Yes
CAN Bus
Arbitration
Figure 19.16 Transmission request
No
Mailbox[x] is ready
to be updated for
next transmission
Clear TXACK[x]
TXACK[x] set?
IRR8 set?
Section 19 Controller Area Network (RCAN-TL1)
Yes
Yes
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Rev. 3.00 Sep. 28, 2009 Page 995 of 1650
No
No
CAN Bus
Waiting for
Waiting for
Interrupt
Interrupt
REJ09B0313-0300