PSB21150FV14XT Infineon Technologies, PSB21150FV14XT Datasheet - Page 73
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PSB21150FV14XT
Manufacturer Part Number
PSB21150FV14XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSB21150FV14XT.pdf
(270 pages)
Specifications of PSB21150FV14XT
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / Rohs Status
Compliant
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IPAC-X
PSB/PSF 21150
Description of Functional Blocks
3.5
Control of Layer-1
The layer-1 activation/ deactivation can be controlled by an internal state machine via
the IOM-2 C/I0 channel or by software via the microcontroller interface directly. In the
default state the internal layer-1 state machine of the IPAC-X is used. By setting the
L1SW bit in the TR_CONF0 register the internal state machine can be disabled and the
layer-1 commands, which are normally generated by the internal state machine are
written directly in the TR_CMD register or indications read from the TR_STA register
respectively. The IPAC-X layer-1 control flow is shown in
Figure
40.
Figure 40
Layer-1 Control
In the following sections the layer-1 control by the IPAC-X state machine will be
described. For the description of the IOM-2 C/I0 channel see also
Chapter
3.7.4.
The layer-1 functions are controlled by commands issued via the CIX0 register. These
commands, sent over the IOM-2 C/I channel 0 to layer 1, trigger certain procedures,
such as activation/deactivation, switching of test loops and transmission of special pulse
patterns. These procedures are governed by layer-1 state diagrams. Responses from
layer 1 are obtained by reading the CIR0 register after a CIC interrupt (ISTA).
The state diagrams of the IPAC-X are shown in
Figure 42
and
Figure
43. The activation/
deactivation implemented by the IPAC-X agrees with the requirements set forth in ITU
recommendations. State identifiers F1-F8 are in accordance with ITU I.430.
Data Sheet
73
2003-01-30
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