SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 356

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

MCRn
Message Control Register
Bit
INTPND
RXIE
TXIE
MSGVAL
NEWDAT
MSGLST
CPUUPD
TXRQ
User’s Manual
RMTPND
15
rw
14
13
TXRQ
Function
Interrupt Pending
Indicates whether this message object has generated an interrupt
request (see TXIE and RXIE), since this bit was last reset by the CPU.
Receive Interrupt Enable
Defines whether bit INTPND is set after successful reception of a frame.
Transmit Interrupt Enable
Defines whether bit INTPND is set after successful transmission of a
frame.
Message Valid
Indicates whether the corresponding message object is valid. The CAN
controller only operates on valid objects. Message objects can be tagged
invalid, while they are changed, or if they are not used at all.
New Data
Indicates whether new data has been written into the data portion of this
message object by CPU (transmit-objects) or CAN controller (receive-
objects) since this bit was last reset.
Message Lost (This bit applies to receive-objects only!)
Indicates that the CAN controller has stored a new message into this
object while NEWDAT was still set; thus, the previously stored message
is lost.
CPU Update (This bit applies to transmit-objects only!)
Indicates that the corresponding message object may not be transmitted
now. The CPU sets this bit to inhibit transmission of a message currently
being updated, or to control the automatic response to remote requests.
Transmit Request
Indicates that the transmission of this message object is requested by
the CPU or via a remote frame and is not yet complete. TXRQ can be
disabled by CPUUPD.
rw
12
1)
MSGLST
CPUUPD
11
rw
10
NEWDAT
9
XReg (EFn0
rw
1)3)
8
19-19
MSGVAL
7
rw
H
)
2)
6
5
TXIE
rw
4
On-Chip CAN Interface
Reset Value: UUUU
C164CM/C164SM
3
RXIE
rw
2
Derivatives
V1.0, 2002-02
INTPND
1
rw
0
H