peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 39

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

Table 4
Pin No.
68
Data Sheet
Symbol
XMFB
XOID
Pin Definitions - System Interface (cont’d)
Input (I)
Output (O)
Supply (S)
O
O
System Interface Transmit
Function
Transmit Multiframe Begin
E1 mode/LOOP.SPN = 0:
Marks the begin of every transmitted multiframe
(XDI).
T1/J1 mode/XC0.MFBS = 1:
XMFB marks the beginning of every transmitted
multiframe (XDI).
T1/J1 mode/XC0.MFBS = 0:
XMFB marks the beginning of every transmitted
superframe. Additional pulses every 12 frames
are provided when using ESF/F24 or F72
format.
General:
This signal is always active high for one 2048
kbit/s period. In 4096 kbit/s mode, it is active
during the first two bits of a multiframe.
Transmit Optical Interface Data
E1 mode only/LOOP.SPN = 1:
Unipolar data sent to fiber optical interface with
2048 kbit/s which will be clocked off on the
positive transitions of XCLK. Clocking off data in
NRZ mode is done with a duty cycle of 100%.
CMI code data is shifted out with a duty cycle of
50%/100% according to the CMI coding.
Output polarity is selected by LIM0.XDOS
(active high after reset).
Single rail mode is selected if LIM1.DRS = 1 and
FMR0.XC1 = 0.
39
Pin Descriptions
FALC-LH V1.3
PEB 2255
2000-07