MC9S12P128 Datasheet, PDF (269/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Freescale’s Scalable Controller Area Network (S12MSCANV3)
Module Base + 0x000C to Module Base + 0x000D
7
6
5
4
3
2
R
0
0
0
0
0
0
W
Reset:
0
0
0
0
0
0
= Unimplemented
Figure 8-16. MSCAN Reserved Register
1. Read: Always reads zero in normal system operation modes
Write: Unimplemented in normal system operation modes
Access: User read/write⁽¹⁾
1
0
0
0
0
0
NOTE
Writing to this register when in special systm operating modes can alter the
MSCAN functionality.
8.3.2.14 MSCAN Miscellaneous Register (CANMISC)
This register provides additional features.
Module Base + 0x000D
Access: User read/write⁽¹⁾
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
BOHOLD
W
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 8-17. MSCAN Miscellaneous Register (CANMISC)
1. Read: Anytime
Write: Anytime; write of ‘1’ clears flag; write of ‘0’ ignored
Table 8-21. 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 8.5.2, “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
8.3.2.15 MSCAN Receive Error Counter (CANRXERR)
This register reflects the status of the MSCAN receive error counter.
S12P-Family Reference Manual, Rev. 1.12
Freescale Semiconductor
269