PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 183

• 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

7.5.1.1
Depending on the selection of the synchronization signals (SYPR or RFM), different
calculation formulas are used to define the position of the synchronization pulses. These
formulas are given below, see
of SYPR and RFM is always the basic T1/J1 bit width (648 ns) in 1.544-MHz mode or
the E1 bit width (488 ns) in 2.048-MHz mode.
This chapter describes the system highway operation in 1.544-MHz mode only. If the
system highway is operated in 2.048-MHz mode, the description given in
Chapter 6.5.1.1
SYPR Offset Calculation
T:
SD:
SC:
X:
0
5
RFM Offset Calculation
MP:
SD:
SC:
X:
0
193
Data Sheet
T
T
(SC/SD) - 2
4:
T
Time between beginning of SYPR pulse and beginning of next frame
(time slot 0, bit 0), measured in number of SCLKR clock intervals
maximum delay: T
Basic data rate; 1.544 Mbit/s
System clock rate; 1.544, 3.088, 6.176, or 12.352 MHz
Programming value to be written to registers RC0 and RC1 (see
Marker position of RFM, counting in SCLKR clock cycles (0 = F-bit)
SC = 1.544 MHz:
SC = 3.088 MHz:
SC = 6.176 MHz:
SC = 12.352 MHz: 0
Basic data rate; 1.544 Mbit/s
System clock rate; 1.544, 3.088, 6.176, or 12.352 MHz
Programming value to be written to registers RC0 and RC1 (see
max
Receive Offset Programming
: X = (200
X = 4 - T + (7
on
Page 117
MP
MP
SC/SD) + 4 - T
max
193
193
0
0
0
SC/SD)
applies.
Figure 61
= (193
MP
MP
MP
MP
(SC/SD) - 3: X = MP + 2 + (7
(SC/SD) - 1: X = MP + 2 - (186
192
385
771
1543
SC/SD) - 1
to
183
Figure 64
for explanation. The pulse length
Functional Description T1/J1
SC/SD)
Rev. 1.1, 2005-06-13
SC/SD)
PEF 2256 H/E
Page
Page
FALC
384).
384).
®
56