psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 60

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

Data Sheet
MX/MR Treatment in Error Case:
In the master mode the MX/MR bits are under control of the microcontroller through MXC
or MRC respectively. An abort is indicated by an MAB interrupt or MER interrupt
respectively.
In the slave mode the MX/MR bits are under control of the SCOUT. An abort is always
indicated by setting the MX/MR bit inactive for two or more IOM-2 frames. The controller
must react with EOM.
Figure 27 shows an example for an abort requested by the receiver, Figure 28 shows
an example for an abort requested by the transmitter and Figure 29 shows an example
for a successful transmission.
Figure 27
Monitor Channel, Transmission Abort requested by the Receiver
Figure 28
Monitor Channel, Transmission Abort requested by the Transmitter
IOM -2 Frame No.
MR (DU)
MX (DD)
IOM -2 Frame No.
MX (DU)
MR (DD)
1
0
1
0
1
0
1
0
1
1
2
2
Abort Request from Transmitter
Abort Request from Receiver
50
3
3
4
4
5
5
EOM
EOM
6
6
mon_rec-abort.vsd
mon_tx-abort.vsd
7
7
PSB 21391
PSB 21393
Interfaces
2001-03-07