MC9S12GRMV1 Datasheet, PDF (603/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

Freescale’s Scalable Controller Area Network (S12MSCANV3)
1 _{Read: Always reads zero in normal system operation modes}
Write: Unimplemented in normal system operation modes
NOTE
Writing to this register when in special system operating modes can alter the
MSCAN functionality.
18.3.2.14 MSCAN Miscellaneous Register (CANMISC)
This register provides additional features.
Module Base + 0x000D
Access: User read/write¹
7
6
5
4
3
2
1
R
0
0
0
0
0
0
0
W
Reset:
0
0
0
0
0
0
0
= Unimplemented
Figure 18-17. MSCAN Miscellaneous Register (CANMISC)
1 _{Read: Anytime}
Write: Anytime; write of ‘1’ clears flag; write of ‘0’ ignored
0
BOHOLD
0
Table 18-21. CANMISC Register Field Descriptions
Field
Description
0
BOHOLD
Bus-off State Hold Until User Request — If BORM is set in 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 18.5.2, “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
18.3.2.15 MSCAN Receive Error Counter (CANRXERR)
This register reflects the status of the MSCAN receive error counter.
Module Base + 0x000E
Access: User read/write¹
7
R RXERR7
6
RXERR6
5
RXERR5
4
RXERR4
3
RXERR3
2
RXERR2
1
RXERR1
0
RXERR0
W
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 18-18. MSCAN Receive Error Counter (CANRXERR)
1 _{Read: Only when in sleep mode (SLPRQ = 1 and SLPAK = 1) or initialization mode (INITRQ = 1 and INITAK = 1)}
Write: Unimplemented
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
605