PEB 2091
PEF 2091
Operational Description
Table 23
Single Bits Control in LT Modes (Downstream)
LT –> NT
Control
Position
MON-2/U
Bit
M41
M51
M61
M42
M52
M62
M43
M44
M45
M46
M47
M48
ACT
State Machine (IEC-Q)
1
MON-2
1
MON-2
DEA
State Machine (IEC-Q)
1
MON-2
FEBE
CRC processor (IEC-Q) and MON8
1
1
Pin PS2
MON-1
1
"0" (IEC-Q)
1
MON-2
UOA
1
State Machine (IEC-Q) / MON-2
MON-2
Table 24
Bit
Function of the Predefined SB in LT Modes
Function
ACT
(Activation bit)
The ACT-bit is part of the start-up sequence and is used to indicate layer 2
to be ready for communication. In this case it is set to (1)
DEA
UOA
(Deactivation bit)
By setting DEA to (0), the network informs the NT of its intention to turn-off
(Partial Activation)
The UOA-bit is used by the network side to inform the NT that only the
U-interface shall be activated (S-interface remains deactivated. If the
UOA-bit is set to (0), only the U-interface will be activated
FEBE
(Far-End Block Error)
The FEBE-bit is used to inform the opposite U-interface station that the
transmitted data could not be received free of errors. The device sets the
FEBE-bit to (0) if errors were observed. Each time a FEBE = (0) is detected,
the internal far-end block error counter will be incremented. Additionally it
is possible to control the FEBE-bit with the MON-8-message "SFB"
Semiconductor Group
119
Data Sheet 01.99
INFINEON [ Infineon ]
