XC886/888CLM
Controller Area Network (MultiCAN) Controller
User’s Manual
15-81
V1.3, 2010-02
MultiCAN, V1.0
RTSEL
6
rh
Receive/Transmit Selected
0
Message object n is not selected for receive or
transmit operation.
1
Message object n is selected for receive or
transmit operation.
Frame Reception:
RTSEL is set by hardware when message object n
has been identified for storage of a CAN frame that is
currently received. Before a received frame becomes
finally stored in message object n, a check is
performed to determine if RTSEL is set. Thus, the
CPU can suppress a scheduled frame delivery to this
message object n by clearing RTSEL by software.
Frame Transmission:
RTSEL is set by hardware when message object n
has been identified to be transmitted next. It is
checked that RTSEL is still set before message
object n is actually set up for transmission and bit
NEWDAT is cleared. It is also checked that RTSEL is
still set before its message object n is verified due to
the successful transmission of a frame.
RTSEL needs to be checked only when the context of
message object n changes and interference with an
ongoing frame transfer will be avoided. In all other
cases, RTSEL can be ignored. RTSEL has no impact
on message acceptance filtering. RTSEL is not
cleared by hardware.
RXEN
7
rh
Receive Enable
0
Message object n is not enabled for frame
reception.
1
Message object n is enabled for frame
reception.
RXEN is only evaluated for receive acceptance
filtering .
Field
Bits
Type Description
*
Содержание XC886CLM
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