H8S-2626 Datasheet, PDF (590/1069 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer

Section 15 Controller Area Network (HCAN)
These constraints allow the setting range shown in table 15.4 for TSEG1 and TSEG2 in BCR.
Table 15.4 Setting Range for TSEG1 and TSEG2 in BCR
TSEG2 (BCR [14:12])
001
010
011
100
101
110
111
TSEG1
0011
No
Yes
No
No
No
No
No
(BCR [11:8]) ₀₁₀₀
Yes^*
Yes
Yes
No
No
No
No
0101
Yes^*
Yes
Yes
Yes
No
No
No
0110
Yes^*
Yes
Yes
Yes
Yes
No
No
0111
Yes^*
Yes
Yes
Yes
Yes
Yes
No
1000
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1001
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1010
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1011
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1100
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1101
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1110
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
1111
Yes^*
Yes
Yes
Yes
Yes
Yes
Yes
Notes: The time quanta value for TSEG1 and TSEG2 is the TSEG value + 1.
* Setting is enabled except when BRP [13:8] = B'000000.
Mailbox Transmit/Receive Settings: HCAN0, 1 each have 16 mailboxes. Mailbox 0 is receive-
only, while mailboxes 1 to 15 can be set for transmission or reception. Mailboxes that can be set
for transmission or reception must be designated either for transmission use or for reception use
before communication begins. The Initial status of mailboxes 1 to 15 is for transmission (while
mailbox 0 is for reception only). Mailbox transmit/receive settings are not initialized by a software
reset.
• Setting for transmission
Transmit mailbox setting (mailboxes 1 to 15)
Clearing a bit to 0 in the mailbox configuration register (MBCR) designates the corresponding
mailbox for transmission use. After a reset, mailboxes are initialized for transmission use, so
this setting is not necessary.
• Setting for reception
Transmit/receive mailbox setting (mailboxes 1 to 15)
Rev. 5.00 Jan 10, 2006 page 566 of 1042
REJ09B0275-0500