PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 213

• Manufacturer Part Number: PEF2256EV22NP
• Manufacturer: Lantiq

Specifications of PEF2256EV22NP

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 56
Register
PC5
PC6
MODE
MODE2
MODE3
RAH(2:1)
RAL(2:1)
RTR(4:1)
TTR(4:1)
TSS2
TSS3
T1/J1 Initialization
For a correct start up of the primary access interface a set of parameters specific to the
system and hardware environment must be programmed after RES goes inactive (high).
Both the basic and the operational parameters must be programmed before the
activation procedure of the PCM line starts. Such procedures are specified in ITU-T
recommendations (e.g. fault conditions and consequent actions). Setting optional
parameters primarily makes sense when basic operation via the PCM line is guaranteed.
Table 57
control bits which are to be programmed in one of the above steps. The sequence is
recommended but not mandatory. Accordingly, parameters for the basic and operational
set up, for example, can be programmed simultaneously. The bit FMR1.PMOD must
always be kept high (otherwise E1 mode is selected). J1 mode is selected by additionally
setting RC0.SJR = 1.
Features like channel loop-back, idle channel activation, clear channel activation,
extensions for signaling support, alarm simulation, etc. are activated later. Transmission
of alarms (e.g. AIS, remote alarm) and control of synchronization in connection with
Data Sheet
gives an overview of the most important parameters in terms of signals and
Initial Values after reset and FMR1.PMOD = 1 (T1/J1) (cont’d)
Initiated
Value
00
00
00
00
00
FD
FF
all 00
all 00
00
00
H
H
H
H
H
H
H
H
H
, FF
, FF
H
H
H
H
Meaning
SCLKR, SCLKX, RCLK configured to inputs,
XMFS active low, CLK1 and CLK2 pin configuration
The activity level of port XMFS can be selected to be
active high or active low by programming PC5.CXMFS.
This bit must not be set, if XMFS is not enabled as an
input. XMFS input selection is done by programming one
of the Transmit Multifunction Ports, using registers
PC4(4:1).XPC(3:0).
Note: XMFS must not be used together with SYPX on
Signaling controller disabled
Compare register for receive address cleared
No time slots selected
different Multifunction Ports.
213
Operational Description T1/J1
Rev. 1.1, 2005-06-13
PEF 2256 H/E
FALC
®
56