3.3.21 Extended ID and Mask Register (M_CAN_XIDAM)
Address: 0h base + 90h offset = 90h
Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0
EIDM
W
Reset
0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
M_CAN_XIDAM field descriptions
Field Description
0–2
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
3–31
EIDM
Extended ID Mask
For acceptance filtering of extended frames the Extended ID and Mask is ANDed with the Message ID of a
received frame. Intended for masking of 29-bit IDs in SAE J1939. With the reset value of all bits set to one
the mask is not active.
NOTE: This field has Protected Write status.
3.3.22 High Priority Message Status Register (M_CAN_HPMS)
This register is updated every time a Message ID filter element configured to generate a
priority event matches. This can be used to monitor the status of incoming high priority
messages and to enable fast access to these messages.
Address: 0h base + 94h offset = 94h
Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
0
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
FLST FIDX MSI BIDX
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M_CAN_HPMS field descriptions
Field Description
0–15
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
Table continues on the next page...
Chapter 3 Modular CAN (M_CAN)
MPC5777C Reference Manual Addendum, Rev. 1, 12/2015
Freescale Semiconductor, Inc. 59
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