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32180 Group User’s Manual (Rev.1.0)
CAN MODULE
13.2 CAN Module Related Registers
CAN0 Global Mask Register Extended ID2 (C0GMSKE2)
<Address: H
’0080 102C>CAN0 Local Mask Register A Extended ID2 (C0LMSKAE2)
<Address:
H
’0080 1034>CAN0 Local Mask Register B Extended ID2 (C0LMSKBE2)
<Address: H
’0080 103C>CAN1 Global Mask Register Extended ID2 (C1GMSKE2)
<Address: H
’0080 142C>CAN1 Local Mask Register A Extended ID2 (C1LMSKAE2)
<Address:
H
’0080 1434>CAN1 Local Mask Register B Extended ID2 (C1LMSKBE2)
<Address: H
’0080 143C>123456B7b0
EID12M EID13M EID14M EID15M EID16M
EID17M
000000
<After reset: H’00>
b Bit Name Function R W
0,1 No function assigned. Fix to "0". 00
2–7 EID12M–EID17M 0: ID not checked R W
(Extended mask ID12–extended mask ID17) 1: ID checked
Three mask registers are used in acceptance filtering: global mask register, local mask register A and local
mask register B. The global mask register is used for message slots 0-13, while local mask registers A and B are
used for message slots 14 and 15, respectively.
• If any bit in this register is set to "0", the corresponding ID bit is masked (assumed to have matched) during
acceptance filtering.
• If any bit in this register is set to "1", the corresponding ID bit is compared with the receive ID during
acceptance filtering and when it matches the ID set in the message slot, the received data is stored in it.
Notes: • EID0M corresponds to the MSB of the extended ID.
• The global mask register can only be modified when none of slots 0-13 have receive requests set.
• The local mask register A can only be modified when slot 14 does not have a receive request set.
• The local mask register B can only be modified when slot 15 does not have a receive request set.
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