PEF24901HV22XT Lantiq, PEF24901HV22XT Datasheet - Page 36

• Manufacturer Part Number: PEF24901HV22XT
• Manufacturer: Lantiq

Specifications of PEF24901HV22XT

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

MX-transition on DOUT from high to low (marker 8 in
(8 frames + 7 frames).
Transmission and reception of monitor messages can be performed simultaneously by
the U-transceiver. In the procedure depicted in
transceiver to transmit monitor data in marker 1–4 (excluding EOM-indication) and
receive monitor data from marker 7 onwards.
M 1/2:Monitor message 1. and 2. byte
R 1/2:Monitor response 1. and 2. byte
Figure 10
Idle State
After the bits MR and MX have been held inactive (i.e. high) for two or more successive
IOM
Standard Transmission Procedure
1. The first byte of monitor data is placed by the external controller on the DIN line of the
2. The DFE-T V2.2 reads the data of the monitor channel and acknowledges by setting
Data Sheet
DFE-T V2.2 and MX is activated (low; marker 1 in
the MR-bit of DOUT active (marker 2 in
- in the third IOM-2 frame if the transmitted bytes are identical in first and second
received frame
- or later if for instance the double last look criterion is not fulfilled within the first and
second receiver frame
®
-frames, the channel is considered idle in this direction.
Mon. Data
Mon. Data
Mon. Data
DIN
DOUT
Handshake Protocol with a 2-Byte Monitor Message/Response
MR
MR
DOUT
MX
DIN
MX
1
0
1
0
1
0
1
0
M1
FF
1
Tx 1.Byte
M1
FF FF FF FF FF FF FF R1 R1 R1 R2 R2 FF FF FF
Ack. 1.Byte
M1
2
M2
3
Tx 2.Byte
M2
Ack. 2.Byte
FF
Figure
37
4
EOM
FF
5
Figure 10
EOM
FF
6
10):
Tx 1.Byte
FF
7
Figure
Figure
FF
8
Ack. 1.Byte
it would be possible for the U-
FF
Tx 2.Byte
10).
10), 1 byte may be saved
FF FF FF FF FF
Functional Description
Ack. 2.Byte
ITD04230
EOM
EOM
PEF 24901
EOM
2002-09-30
DFE-T