psb21381 Infineon Technologies Corporation, psb21381 Datasheet - Page 72
psb21381
Manufacturer Part Number
psb21381
Description
Siemens Codec With S/t Transceiver
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PSB21381.pdf
(270 pages)
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Data Sheet
2.2.7
D-channel access control was defined to guarantee all connected HDLC controllers a fair
chance to transmit data in the D-channel.
Collisions are possible on the IOM-2 interface, if there are more than one HDLC
controller connected, or on the S-interface if there are more than one terminal connected
in a point to multipoint configuration (NT -> TE1 ... TE8). Both arbitration mechanisms
are implemented in the SCOUT and will be described in the following two chapters.
2.2.7.1
The TIC bus is implemented to organize the access to the layer-1 functions provided in
the SCOUT (C/I-channel) and to the D-channel from up to 7 external communication
controllers (see figure 38).
To this effect the outputs of the controllers (ICC:ISDN Communication Controller PEB
2070) are wired-or 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 MODEH.DIM2-0=00x.
Figure 38
Applications of TIC Bus in IOM-2 Bus Configuration
D-channel
Telemetry/
Packet
Communication
B-channel
Voice/Data
Communication
with D-channel
Signaling
B-channel
Voice/Data
Communication
with D-channel
Signaling
D-Channel Access Control
TIC Bus D-Channel Access Control
µC-Interface
TIC Bus
D-channel
Access Control
ICC(7)
ICC(1)
IOM-2 Interface
SCOUT-S(X)
62
S-Transceiver
S-Interface
NT
PSB 21381/2
PSB 21383/4
TIC_ARBI-S0.vsd
U-Interface
Interfaces
2001-03-12
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