PEB2255 datasheet(39/374 Pages) INFINEON

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PEB 2255

FALC-LH V1.3

Pin Descriptions

Data Sheet

2000-07

System Interface Transmit

68XMFB

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,itis active

during the first two bits of a multiframe.

XOID

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.

Table 4

Pin Definitions - System Interface (cont’d)

Pin No.

Symbol

Input (I)

Output (O)

Supply (S)

Function

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