XC161 Datasheet, PDF (319/419 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core Volume 2 (of 2): Peripheral Units

XC161 Derivatives
Peripheral Units (Vol. 2 of 2)
TwinCAN Module
Field
Bits Type Description
MMC
[10:8] rw
High
Message Object Mode Control
Bitfield MMC controls the functionality of message
object n.
000_B
010_B
011_B
100_B
Standard message object functionality
FIFO functionality enabled (base object)
FIFO functionality enabled (slave object)
Normal gateway functionality for incoming
frames
101_B
Shared gateway functionality for incoming
frames
others reserved
0
[7:5], –
Reserved; returns ‘0’ if read; should be written with ‘0’.
12
Low
[7:5],
[15:11]
High
1) As a result, a message will not be re-transmitted if it has lost arbitration or has been corrupted by an error
frame.
Note: Changes of bitfield CANPTR for transmission objects are only taken into account
after setting bitfield MSGVAL to ‘10’. This avoids unintentional modification while
the message object is still active by explicitly defining a timing instant for the
update. Bitfield CANPTR for transmission objects can be written while MSGVAL
is ‘01’ or ‘10’, the update always takes place by setting MSGVAL to ‘10’. Changes
of bitfield CANPTR for receive objects are immediately taken into account.
User’s Manual
TwinCAN_X1, V2.1
21-79
V2.2, 2004-01