Rainbow Electronics T89C51CC01 - Manual (Page 104)

104
T89C51CC01
Rev. D – 17-Dec-01
Table 70. CANIDM4 Register for V2.0 part B
CANIDM4 for V2.0 part B
(S:C7h)
CAN Identifier Mask Registers 4
Note: The ID Mask is only used for reception.
No default value after reset.
Table 71. CANMSG Register
CANMSG (S:A3h)
CAN Message Data Register
No default value after reset.
7 6 5 4 3 2 1 0
IDMSK 4 IDMSK 3 IDMSK 2 IDMSK 1 IDMSK 0 RTRMSK - IDEMSK
Bit
Number
Bit
Mnemonic Description
7-3 IDMSK4:0
IDentifier mask value
0 - comparison true forced.
1 - bit comparison enabled.
See Figure 37.
2 RTRMSK
Remote transmission request mask value
0 - comparison true forced.
1 - bit comparison enabled.
1 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
0 IDEMSK
IDentifier Extension mask value
0 - comparison true forced.
1 - bit comparison enabled.
7 6 5 4 3 2 1 0
MSG 7 MSG 6 MSG 5 MSG 4 MSG 3 MSG 2 MSG 1 MSG 0
Bit
Number
Bit
Mnemonic Description
7-0 MSG7:0
Message data
This register contains the mailbox data byte pointed at the page message object
register.
After writing in the page message object register, this byte is equal to the
specified message location (in the mailbox) of the pre-defined identifier + index.
If auto-incrementation is used, at the end of the data register writing or reading
cycle, the mailbox pointer is auto-incremented. The range of the counting is 8
with no end loop (0, 1,..., 7, 0,...)