PEF24901HV22XP Lantiq, PEF24901HV22XP Datasheet - Page 37

• Manufacturer Part Number: PEF24901HV22XP
• Manufacturer: Lantiq

Specifications of PEF24901HV22XP

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

3. The second byte of monitor data is placed by the controller on DIN and the MX-bit is
4. The DFE-T V2.2 latches the new data byte in the frame, where the rising edge of MX
5. After both monitor data bytes have been transferred to the DFE-T V2.2, the controller
6. In the frame following the transition of the MX-bit from active to inactive, the DFE-T
7. If the DFE-T V2.2 is requested to return an answer it will commence with the response
Transmission Abortion
If no EOM is detected after the first two monitor bytes, or received bytes are not identical
in the first two received frames, transmission will be aborted through receiver by setting
the MR-bit inactive for two or more IOM
situation is illustrated in
Data Sheet
set inactive for one single IOM
controller (marker 3 in
has been detected. In the frame immediately following the MX-transition active-to-
inactive, the MR-bit of DOUT is set inactive. If double last look is fulfilled, then the
receiver will make a MR-transition inactive-to-active exactly one IOM
which the external controller will regard as acknowledgement (marker 4 in
Else the receiver will sent an Abort Request.
transmits “End Of Message” (EOM) by setting the MX-bit inactive for two or more
IOM
V2.2 sets the MR-bit inactive (as was the case in step 4). As it detects EOM, it keeps
the MR-bit inactive (marker 6 in
command by the controller is complete. In case of a three byte message, the
transmission of the 3rd byte is similar to the procedure described in points 3 – 5.
as soon as possible.
immediately (marker 7 in
The procedure for the response is similar to that described in points 1 – 6 except for
the transmission direction.
Transmission of the 2nd monitor byte will be started by the DFE-T V2.2 in the frame
immediately following the acknowledgment of the first byte. The U-transceiver does
not delay the monitor transfer.
®
-frames (marker 5 in
Figure 10
Figure
Figure
Figure
Figure
11.
10).
®
-frame. This is performed at a time convenient to the
illustrates the case where the response can be sent
Figure
10).
10).
®
-2-frames. The controller reacts with EOM. This
38
10). The transmission of the 2 byte monitor
Functional Description
®
PEF 24901
-frame later,
Figure
2002-09-30
DFE-T
10).