UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 660

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

658
Note Clear all TRQ bits when re-initialization of message buffer is executed by clearing RDY bit before bus-off
Caution When the transmission from the initialization mode to any operation modes is requested to
Remark OPMODE: Normal operation mode, normal operation mode with ABT, receive-only mode, single-shot
recovery sequence is started.
execute bus-off recovery sequence again in the bus-off recovery sequence, reception error
counter is cleared.
Therefore it is necessary to detect 11 consecutive recessive-level bits 128 times on the bus
again.
Figure 15-56. Bus-Off Recovery (Expect Normal Operation Mode with ABT)
No
mode, self-test mode
Access to registers other than
Forced recovery from bus off?
C0CTRL and C0GMCTRL
Set C0CTRL register
Set C0CTRL register
Clear all TRQ bits
(Clear OPMODE)
(Set OPMODE)
Set CCERC bit
Yes
BOFF = 1?
registers
START
END
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
Yes
Note
No
Set C0CTRL register
Wait for recovery
from bus off
(Set OPMODE)