SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 359

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

Message Configuration
The Message Configuration Register (low byte of MCFGn) holds a description of the
message within this object.
Note: There is no “don’t care” option for bits XTD and DIR. So, incoming frames can only
MCFGn
Message Configuration Reg.
Bit
XTD
DIR
DLC
Note: The first data byte occupies the upper half of the message configuration register.
User’s Manual
15
match with corresponding message objects either standard (XTD = 0) or extended
(XTD = 1). Data frames match with receive-objects only; remote frames match
with transmit-objects only.
When the CAN controller stores a data frame, it will write all the eight data bytes
into a message object. If the data length code was less than 8, the remaining bytes
of the message object will be overwritten by non-specified values.
14
13
Function
Extended Identifier
0:
1:
Message Direction
0:
1:
Data Length Code
Defines the number of valid data bytes within the data area.
Valid values for the data length are 0 … 8.
Data Byte 0
12
rw
Standard
This message object uses a standard 11-bit identifier.
Extended
This message object uses an extended 29-bit identifier.
Receive Object.
On TXRQ, a remote frame with the identifier of this message
object is transmitted.
On reception of a data frame with matching identifier, that
message is stored in this message object.
Transmit Object.
On TXRQ, the respective message object is transmitted.
On reception of a remote frame with matching identifier, the TXRQ
and RMTPND bits of this message object are set.
11
10
9
XReg (EFn6
8
19-22
7
H
)
6
DLC
rw
5
4
On-Chip CAN Interface
Reset Value: - - UU
DIR XTD
C164CM/C164SM
rw
3
rw
2
Derivatives
V1.0, 2002-02
1
0
r
0
0
r
H