PEB2256HT datasheet(265/490 Pages) INFINEON

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FALC56 V1.2

PEB 2256

E1 Registers

Data Sheet

265

2002-08-27

010 =RMFB: Receive Multiframe Begin (Output)

Marks the beginning of every received multiframe or optionally

the begin of every CAS multiframe begin (active high).

011 = RSIGM: Receive Signaling Marker (Output)

Marks the time slots which are defined by register RTR(4:1) of

every frame on port RDO.

100 = RSIG: Receive Signaling Data (Output)

The received CAS multiframe is transmitted on this pin. Time

slot on RSIG correlates directly to the time slot assignment on

RDO.

101 = DLR: Data Link Bit Receive (Output)

Marks the S

a-bits within the data stream on RDO.

110 = FREEZE: Freeze Signaling (Output)

The freeze signaling status is active high by detecting a loss-of-

signal alarm, or a loss of CAS frame alignment or a receive slip

(positive or negative). It stays high for at least one complete

multiframe after the alarm disappears. Setting SIC2.FFS

enforces a high on pin FREEZE.

111 = RFSP: Receive Frame Synchronous Pulse (Output)

Marks the frame begin in the receivers synchronous state. This

marker is active low for 488 ns with a frequency of 8 kHz.

XPC(3:0)

Transmit multifunction Port Configuration

The multifunction ports XP(A to D) are bidirectional. After Reset these

ports are configured as inputs. With the selection of the pin function

the In/Output configuration is also achieved. Each of the four different

input functions (SYPX, XMFS, XSIG, TCLK) may only be selected

once. No input function must be selected twice or more. SYPX and

XMFS should not be selected in parallel. Register PC1 configures

port XPA, while PC2

→ port XPB, PC3 → port XPC and PC4 → port

XPD.

0000 = SYPX: Synchronous Pulse Transmit (Input)

Together with register XC(1:0) SYPX defines the frame begin

on the transmit system interface ports XDI and XSIG.

0001 = XMFS: Transmit Multiframe Synchronization (Input)

Together with register XC(1:0) XMFS defines the frame and

multiframe begin on the transmit system interface ports XDI

and XSIG. Depending on PC5.CXMFS the signal on XMFS is

active high or low.

0010 = XSIG: Transmit Signaling Data (Input)

Input for transmit signaling data received from the signaling

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