Intel 87C196CB Manual De Usuario
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.
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
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.)
the DLC field in CAN_MSG1CFG must contain 04H.)
Figure 7-16. CAN Message Object Data (CAN_MSG
xDATA0–7) Registers