PEF2256 INFINEON [Infineon Technologies AG], PEF2256 Datasheet - Page 219
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PEF2256
Manufacturer Part Number
PEF2256
Description
E1/T1/J1 Framer and Line Interface Component for Long- and Short-Haul Applications
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PEF2256.pdf
(518 pages)
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8.3.7
The FALC
Interfaces using the Extended Super Frame format. The HDLC channel 1 of the device
supports the DL-channel protocol for ESF format according to T1.403-1989 ANSI or to
AT&T TR54016 specification. The HDLC and Bit Oriented Message (BOM) -Receiver
can be switched on/off independently. If the FALC
BOM receiver has to be switched off. If HDLC and BOM receiver has been switched on
(MODE.HRAC/BRAC), an automatic switching between HDLC and BOM mode is
enabled. Storing of received DL-bit information in the RFIFO of the signaling controller
and transmitting the XFIFO contents in the DL-bit positions is enabled by CCR1.EDLX/
EITS = 10. After hardware-reset (pin RES low) or software-reset (CMDR.RRES = 1) the
FALC
BOM mode is entered. Upon detection of a flag in the data stream, the FALC
switches back to HDLC mode. Operating in BOM mode, the FALC
an HDLC frame immediately, i.e. without any preceding flags.
In BOM mode, the following byte format is assumed (the left most bit is received first;
111111110xxxxxx0).
The FALC
(first bit received: LSB) if it starts and ends with a “0”. Bytes starting and ending with a
“1” are not stored. If there are no 8 consecutive ones detected within 32 bits, an interrupt
is generated. However, byte sampling is not stopped.
User’s Manual
Hardware Description
defined by register XC0.SA8E to SA84E and the corresponding bits of
TSWM.TSA(8:4). Any combination of S
been sent out completely an “all ones” or Flags (CCR1.ITF) is transmitted. The
continuous transmission of a transparent bit stream, which is stored in the XFIFO,
can be enabled.
With the setting of bit MODE.HRAC the received S
receive FIFO.
The access to and from the FIFOs is supported by ISR0.RME/RPF and ISR1.XPR/
ALS.
®
56 operates in HDLC mode. If eight or more consecutive ones are detected, the
®
®
Bit Oriented Message Mode (T1/J1)
56 uses the FF
56 supports signaling and maintenance functions for T1/J1 primary rate
H
byte for synchronization, the next byte is stored in RFIFO
219
a
-bits can be selected. After the data has
Signaling Controller Operating Modes
®
56 is used for HDLC formats only, the
a
-bits can be forwarded to the
®
56 is able to receive
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
®
56
56
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