Functional Description
µP
IOM R -2
D-Channel
Telemetry/
Packet
ICC (7)
Communication
B-Channel
Voice/Data
Communication
with D-Channel
Signaling
ICC (2)
E-Channel
IVD LAN
Application
DCL
ICC (1) FSC
IDP1
IDP0
E-Channel
Echo
B-Channel
Voice/Data
CCITT
S-Interface
ISAC R -S
Communication
with D-Channel
Signaling
ITS00854
Figure 38
Applications of TIC Bus in IOM®-2 Bus Configuration
2.4.6 TIC Bus Access
In IOM-2 interface mode the TIC bus capability is only available in TE mode. The arbitration
mechanism implemented in the last octet of IOM channel 2 of the IOM allows the access of
external communication controllers (up to 7) to the layer-1 functions provided in the ISAC-S
and to the D channel. (TIC bus; see figure 38). To this effect the outputs of the controllers
(ICC:ISDN Communication Controller PEB 2070) are wired-or-and connected to pin IDP1. The
inputs of the ICCs are connected to pin IDP0. External pull-up resistors on IDP0/1 are required.
The arbitration mechanism must be activated by setting MODE:DIM2–0=001 (see
chapter 4.1.7).
An access request to the TIC bus may either be generated by software (µP access to the C/I
Semiconductor Group
76
INFINEON [ Infineon ]
