Datasheet

Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor 439
Read: Always read 0x0000 in normal system operation modes
Write: Unimplemented in normal system operation modes
NOTE
Writing to this register when in special modes can alter the MSCAN
functionality.
10.3.2.14 MSCAN Miscellaneous Register (CANMISC)
This register provides additional features.
Read: Anytime
Write: Anytime; write of ‘1’ clears flag; write of ‘0’ ignored
10.3.2.15 MSCAN Receive Error Counter (CANRXERR)
This register reflects the status of the MSCAN receive error counter.
76543210
R00000000
W
Reset: 00000000
= Unimplemented
Figure 10-16. MSCAN Reserved Register
76543210
R0000000
BOHOLD
W
Reset: 00000000
= Unimplemented
Figure 10-17. MSCAN Miscellaneous Register (CANMISC)
Table 10-19. CANMISC Register Field Descriptions
Field Description
0
BOHOLD
Bus-off State Hold Until User Request — If BORM is set in Section 10.3.2.2, “MSCAN Control Register 1
(CANCTL1), this bit indicates whether the module has entered the bus-off state. Clearing this bit requests the
recovery from bus-off. Refer to Section 10.5.2, “Bus-Off Recovery,” for details.
0 Module is not bus-off or recovery has been requested by user in bus-off state
1 Module is bus-off and holds this state until user request