PSF21150HV14NP Infineon Technologies, PSF21150HV14NP Datasheet - Page 132
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PSF21150HV14NP
Manufacturer Part Number
PSF21150HV14NP
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSF21150HV14NP.pdf
(270 pages)
Specifications of PSF21150HV14NP
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / Rohs Status
Not Compliant
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Figure 75
S-Bus D-channel Access Control in the IPAC-X
The above described priority mechanism is fully implemented in the IPAC-X. For this
purpose the D-channel collission detection according to ITU I.430 must be enabled by
setting MODED.DIM2-0 to ’0x1’. In this case the transceiver continuously compares the
received E-echo bits with its own transmitted D data bits.
Depending on the priority class selected, 8 or 10 consecutive ONEs (high priority level,
priority 8) need to be detected before the transceiver sends valid D-channel data on the
upstream D-bits on S. In low priority level (priority 10) 10 or 11 consecutive ONEs are
required.
The priority class (priority 8 or priority 10) is selected by transferring the appropriate
activation command via the Command/Indication (C/I) channel of the IOM-2 interface to
the transceiver. If the activation is initiated by a TE, the priority class is selected implicitly
by the choice of the activation command. If the S-interface is activated from the NT, an
activation command selecting the desired priority class should be programmed at the TE
on reception of the activation indication (AI8 or AI10). In the activated state the priority
class may be changed whenever required by simply programming the desired activation
request command (AR8 or AR10).
Data Sheet
IPAC-X
D-channel
D-channel
D-channel
control
control
control
D-Channel Access Control on the S-Interface
TE 1
TE 2
.
.
.
TE 8
transceiver
transceiver
transceiver
S-
S-
S-
132
S-Interface
Description of Functional Blocks
D-Bits
E-Bits
NT
PSB/PSF 21150
21150_10
U-Interface
2003-01-30
IPAC-X
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