PEF24901HV22XT Lantiq, PEF24901HV22XT Datasheet - Page 38

• Manufacturer Part Number: PEF24901HV22XT
• Manufacturer: Lantiq

Specifications of PEF24901HV22XT

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

Figure 11
3.2.4
MON-12 commands feature direct access to the device internal register map via the
Monitor channel. This means that although the DFE-T V2.2 features no microcontroller
interface internal register functions can be directly addressed by use of MON-12
commands.
A MON-12 read request command must be first acknowledged by the DFE-T V2.2 before
a subsequent read request can be triggered. In case of a failure condition the DFE-T
V2.2 repeats the last outstanding MON-12 answer. MON-12 commands are prioritized
over the other MON classes.
If U-interface functions are addressed then the value of register LP_SEL determines the
register bank of the channel that is referred to. As a result the desired line port number
must be programmed first in register LP_SEL before any U-interface register can be
accessed. For this reason MON-12 commands may not be issued simultaneously on
different IOM
functions.
For registers that are addressable by MON-12 commands please refer to the register
map in
MON-12 commands are of the following format:
• A MON-12 write command comprises 3 bytes, the first byte contains the MON-12
• A MON-12 read request command comprises 2 bytes, the first byte contains the
Data Sheet
header, the second byte the register address, the third byte the register value.
MON-12 header, the second byte the register address of the data that is requested.
Chapter
MON-12 Protocol
®
Abortion of Monitor Channel Transmission
-2 channels, but must be issued consecutively if they address U-interface
6.2.
39
Functional Description
PEF 24901
2002-09-30
DFE-T