Section 19
Controller Area Network (RCAN-TL1)
Rev. 0.50 May 18, 2006 Page 961 of 1588
REJ09B0313-0050
19.4.2
Configuration of RCAN-TL1
RCAN-TL1 is considered in configuration mode or after a H/W (Power On Reset)/S/W (MCR[0])
reset or when in Halt mode. In both conditions RCAN-TL1 cannot join the CAN Bus activity and
configuration changes have no impact on the traffic on the CAN Bus.
•
After a Reset request
The following sequence must be implemented to configure the RCAN-TL1 after (S/W or H/W)
reset. After reset, all the registers are initialised, therefore, RCAN-TL1 needs to be configured
before joining the CAN bus activity. Please read the notes carefully.
No
Yes
Power On/SW Reset
*
1
Clear IRR[0] Bit
GSR[3] = 0?
Detect 11 recessive bits and
Join the CAN bus activity
RCAN-TL1 is in Tx_Rx Mode
- Set TXPR to start transmission
- or stay idle to receive
Configure MCR[15]
Clear MCR[0]
Clear Required IMR Bits
RCAN-TL1 Timer Reg Setting
Set Bit Timing (BCR)
Mailbox Setting
(STD-ID, EXT-ID, LAFM, DLC,
RTR, IDE, MBC, MBIMR, DART,
ATX, NMC, Tx-Trigger
Time Message-Data)
*
2
IRR[0] = 1, GSR[3] = 1
(automatically)
Transmission_Reception
(Tx_Rx) Mode
Receive
*
3
Transmit
*
3
Timer Start
*
4
Notes: 1. SW reset could be performed at any time by setting MCR[0] = 1.
2. Mailboxes are comprised of RAMs, therefore, please initialise all the mailboxes enabled by MBC.
3. If there is no TXPR set, RCAN-TL1 will receive the next incoming message. If there is a TXPR(s)
set, RCAN-TL1 will start transmission of the message and will be arbitrated by the CAN bus.
If it loses the arbitration, it will become a receiver.
4. Timer can be started at any time after the Timer Control regs and Tx-Trigger Time are set.
MCR[0] = 1 (automatically
in hardware reset only)
Configuration Mode
Reset Sequence
Figure 19.14 Reset Sequence
Содержание Single-Chip Microcomputer SH7203
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