Filter
Top Products
87C196CB SUPPLEMENT
7-34
.
CAN_MSG
x
CON0
(
n
= 1–15)
Address: 1E
x
0H (
x
=1–F)
Reset State: Unchanged
Program the CAN message object
x
control 0 register (CAN_MSGxCON0) to indicate whether the
message object is ready to transmit and to control whether a successful transmission or reception
generates an interrupt. The most-significant bit-pair indicates whether an interrupt is pending.
This register consists of four bit-pairs — the most-significant bit of each pair is in true form and the
least-significant bit is in complement form. This format allows software to set or clear any bit with a
single write operation, without affecting the remaining bits.
7 0
MSGVAL MSGVAL TXIE TXIE RXIE RXIE INT_PND INT_PND
Bit
Number
Bit
Mnemonic
Function
7:6 MSGVAL Message Object Valid
5:4 TXIE Transmit Interrupt Enable
3:2 RXIE Receive Interrupt Enable
1:0 INT_PND Interrupt Pending
This bit-pair indicates that the CAN peripheral has initiated a transmit (TX)
or receive (RX) interrupt. Software must clear this bit when it services the
interrupt.
01 = no interrupt
10 = an interrupt was generated
Figure 7-21. CAN Message Object
x
Control 0 (CAN_MSG
x
CON0) Register