pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 104

• Manufacturer Part Number: pef2256e
• Description: E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
• Manufacturer: Infineon Technologies Corporation

combination of S
selected by XC0.SA(8:4).
4.4.7.4
In external signaling mode (serial mode) the signaling data received on port XSIG is
sampled with the working clock of the transmit system interface (SCLKX) in combination
with the transmit synchronization pulse (SYPX). Data on XSIG is latched in the bit
positions 5 to 8 per time slot, bits 1 to 4 are ignored. Time slots 0 and 16 are sampled
completely (bit 1 to 8). The received CAS multiframe is inserted frame aligned into the
data stream on XDI and must be valid during the last frame of a multiframe if
CRC4/multiframe mode is selected. The CAS multiframe is aligned to the
CRC4-multiframe; other frames are ignored. Data sourced by the internal signaling
controller (µP access mode) overwrites the external signaling data.
If the FALC
the FALC
Note: CAS data on XSIG is read in the last frame of a multiframe only and ignored in all
Figure 29
4.4.7.5
Transmit data stored in registers XS(16:1) is transmitted on a multiframe boundary in
time slot 16. The signaling controller inserts the bit stream either on the transmit line side
or, if external signaling is enabled, on the transmit system side using pin function XSIG.
Data sourced by the internal signaling controller overwrites the external signaling data.
User’s Manual
Hardware Description
SYPX
SCLKX
XDI
XSIG
other frames.
®
56 undisturbedly.
Channel Associated Signaling CAS (E1, serial mode)
Channel Associated Signaling CAS (E1, µP access mode)
®
56 is configured for no signaling, the system interface data stream passes
T
FAS
NFAS
ABCD
0000XYXX
A B C D
4 5 6 7
2.048 MHz Transmit Signaling Highway (E1)
TS31
a
T
-bits which shall be inserted in the outgoing data stream can be
FAS/NFAS
FAS/NFAS
= Time slot offset (XC0, XC1)
= Frame alignment signal, is taken from XSIG, not from XDI
= TS0 not containing FAS
= Signaling bits for time slots 1...15 and 17...31 of CAS multiframe
= CAS multiframe alignment signal, has to be provided in TS16
TS0
0 1 2 3 4 5 6 7
TS1
A B C D
104
0 1 2 3 4 5 6 7
0 0 0 0 X Y X X
TS16
Functional Description E1
0 1 2 3 4 5 6 7
DS1.1, 2003-10-23
PEF 2256 H/E
TS31
A B C D
FALC
F0132
®
56