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87C196CB SUPPLEMENT
7-28
CAN_MSG
x
DATA0–7
x
= 1–15 (87C196CB)
Address:
Reset State:
1E
x
EH, 1E
x
DH,
1E
x
CH, 1E
x
BH,
1E
x
AH, 1E
x
9H,
1E
x
8H, 1E
x
7H
(
x
= 1–F)
Unchanged
The CAN message object data (CAN_MSG
x
DATA0–7) registers contain data to be transmitted or data
received. Any unused data bytes have random values that change during operation.
87C196CB 7 0
CAN_MSG
x
DATA7 Data 7
7 0
CAN_MSG
x
DATA6 Data 6
7 0
CAN_MSG
x
DATA5 Data 5
7 0
CAN_MSG
x
DATA4 Data 4
7 0
CAN_MSG
x
DATA3 Data 3
7 0
CAN_MSG
x
DATA2 Data 2
7 0
CAN_MSG
x
DATA1 Data 1
7 0
CAN_MSG
x
DATA0 Data 0
Bit
Number
Function
7:0 Data
Each message object can use from zero to eight data registers to hold data to
be transmitted or data received.
For receive message objects, these registers accept data during a reception.
For transmit message objects, write the data that is to be transmitted to these
registers. The number of data bytes must match the DLC field in the
CAN_MSG
x
CFG register. (For example, if CAN_MSG1DATA0,
CAN_MSG1DATA1, CAN_MSG1DATA2, and CAN_MSG1DATA3 contain data,
the DLC field in CAN_MSG1CFG must contain 04H.)
Figure 7-16. CAN Message Object Data (CAN_MSG
x
DATA0–7) Registers