PEB3086 Infineon Technologies, PEB3086 Datasheet - Page 121

• Manufacturer Part Number: PEB3086
• Description: ISDN Subscriber Access Controller
• Manufacturer: Infineon Technologies

Figure 64
3.7.5
D-channel access control is defined to guarantee all connected TEs and HDLC
controllers a fair chance to transmit data in the D-channel. Collisions are possible
• on the IOM-2 interface if there is more than one HDLC controller connected or
• on the S-interface when there is more than one terminal connected in a point to
Both arbitration mechanisms are implemented in the ISAC-SX and will be described in
the following two chapters.
3.7.5.1
The TIC bus is imlemented to organize the access to the layer-1 functions provided in
the ISAC-SX (C/I-channel) and to the D-channel from up to 7 external communication
controllers (see
Note: The TIC Bus can be used in TE/iNT mode only. In other modes it has to be
To this effect the outputs of the D-channel controllers (e.g. ICC - ISDN Communication
Controller PEB 2070) are wired-or (negative logic, i.e. a “0” wins) and connected to pin
DU. The inputs of the ICCs are connected to pin DD. External pull-up resistors on DU/
DD are required. The arbitration mechanism must be activated by setting
MODED.DIM2-0=00x.
Data Sheet
multipoint configuration (NT ® TE1 … TE8).
switched off in order not to disturb the layer-1 control and the HDLC
controller. This is done by setting bit DIM 1 in register Mode D and bit 4 in
register IOM_CR. For more details please refer to the application note
“Reconfigurable PBX”.
D-Channel Access Control
TIC Bus D-Channel Access Control
CIC Interrupt Structure
Figure
TRAN
MASK
WOV
MOS
ICD
ICB
CIC
ST
Interrupt
65).
TRAN
ISTA
WOV
MOS
ICD
ICB
CIC
ST
121
Description of Functional Blocks
CI1E
CIX1
CIC0
CIC1
CIR0
PEB 3086
2003-01-30
ISAC-SX