Rainbow Electronics T89C51CC02 - Manual (Page 98)

98 Rev.A - May 17, 2001
Preliminary
T89C51CC02
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.
Figure 95. CANIDM4 Register for V2.0 part B
CANMSG (S:A3h)
CAN Message Data Register
No default value after reset.
Figure 96. CANMSG Register
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 62.
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 dynamic of
the counting is 8 with no end loop (0, 1,..., 7, 0,...)