peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 134

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

5.3.4
The analog transmitter transforms the unipolar bit stream to ternary (alternate bipolar)
return to zero signals of the appropriate programmable shape. The unipolar data is
provided by pin XDI and the digital transmitter.
Similar to the receive line interface three different data types are supported:
Figure 49
•
Table 30
Parameter
Characteristic Impedance [ ]
R
t2 : t1
• Ternary Signal
• Dual rail data PCM(+), PCM(-) at multifunction ports XDOP and XDON with 50 % or
• Unipolar data on port XOID is transmitted in NRZ (Non Return to Zero) with 100 %
Data Sheet
1
Selection between B8ZS or simple AMI coding with zero code suppression (B7
stuffing) is provided. B7 stuffing may be disabled on a per time slot basis (Clear
Channel capability). Selected by FMR0.XC1/0 and LIM1.DRS = 0.
100 % duty cycle and with programmable polarity. Line coding is done in the same
way as in the ternary interface. Selected by FMR0.XC1=1 and LIM1.DRS = 1.
duty cycle to a fibre optical interface. Clocking off data is done with the rising edge of
the transmit clock XCLK (1544 kHz) and with a programmable polarity. Selection is
done by FMR0.XC1...0 = 00 and LIM1.DRS = 1.
( 1 %) [ ]
Single rail data is converted into a ternary signal which is output on pins XL1 and XL2.
Transmit Line Interface (T1/J1)
Transmitter Configuration (T1/J1)
Example Transmitter Configuration Values (T1/J1)
Line
t
1
t
2
134
R
R
1
1
1 :
XL1
XL2
100
T1
Functional Description T1/J1
5
FALC
2
R
ITS10968
FALC-LH V1.3
1 :
110
PEB 2255
J1
5
2
2000-07