PSB2115HV1.2 Lantiq, PSB2115HV1.2 Datasheet - Page 113

• Manufacturer Part Number: PSB2115HV1.2
• Manufacturer: Lantiq

Specifications of PSB2115HV1.2

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Semiconductor Group
2.7
2.7.1
The IOM-2 is a generalization and enhancement of the IOM-1. While the basic frame
structure is very similar, IOM-2 offers further capacity for the transfer of maintenance
information. In terminal applications, the IOM-2 constitutes a powerful backplane bus
offering intercommunication and sophisticated control capabilities for peripheral
modules.
The channel structure of the IOM-2 is depicted in figure 51.
Figure 51
• The 64-kbit/s channels, B1 and B2, are conveyed in the first two octets.
• The third octet (monitor channel) is used for transferring maintenance information
• The fourth octet (control channel) contains
– two bits for the 16-kbit/s D channel
– four command/indication bits for controlling activation/deactivation and for additional
– two bits MR and MX for supporting the handling of the MONITOR channel.
The IOM-2 frame structure depends on whether TE- or non-TE mode is selected, via
pins MODE0 and MODE1:
TE mode
LT-T mode
LT-S mode
Note: In TE mode pin MODE1 is not required for mode selection but used as EAW.
between the layer-1 functional blocks (e.g. IEC-Q TE) and the layer-2 controller (see
chapter 2.7.4).
control functions
IOM
IOM
Channel Structure of IOM
®
®
-2 Interface
-2 Frame Structure / Timing Modes
MODE0
0
1
1
MODE1/EAW
EAW
1
0
®
113
-2
Functional Description
PSB 2115
PSF 2115
11.97