pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 216
pef2256e
Manufacturer Part Number
pef2256e
Description
E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF2256E.pdf
(518 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
pef2256eV2.1ES
Manufacturer:
HARRIS
Quantity:
101
Company:
Part Number:
pef2256eV2.2
Manufacturer:
INFINEON
Quantity:
513
- Current page: 216 of 518
- Download datasheet (6Mb)
HDLC mode is selected, the limits for “Valid Frame” check are modified (refer to
description of bit RSIS.VFR).
•
If CCR2.XCRC is set, the CRC checksum is not generated internally. The checksum has
to be provided via the transmit FIFO (XFIFO) as the last two bytes. The transmitted frame
is closed automatically by a closing flag only.
The FALC
to be transmitted is valid or not.
8.3.3
The address field of received frames can be pushed to the receive FIFOs (first one or
two bytes of a frame). This function is used together with extended address recognition.
It is enabled by setting control bit CCR2.RADD (CCR3.RADD2, CCR4.RADD3).
8.3.4
In transmit direction 2 × 32 byte FIFO buffers are provided for each HDLC channel. After
checking the XFIFO status by polling bit SIS.XFW (SIS2.XFW2, SIS3,XFW3) or after an
interrupt ISR1.XPR (ISR5.XPR2, ISR5.XPR3, Transmit Pool Ready), up to 32 bytes can
be entered by the CPU to the XFIFOs.
The transmission of a frame can be started by issuing a XTF or XHF command via the
command registers. If the transmit command does not include an end of message
indication (CMDR.XME, CMDR3.XME2, CMDR4.XME3), the FALC
request for the next data block by means of an XPR interrupt as soon as no more than
32 bytes are stored in the XFIFO, i.e. a 32-byte pool is accessible to the CPU.
This process is repeated until the CPU indicates the end of message by XME command,
after which frame transmission is finished correctly by appending the CRC and closing
flag sequence. Consecutive frames can share a flag, or can be transmitted as back-to-
back frames, if service of the XFIFOs is fast enough.
In case no more data is available in the XFIFOs prior to the arrival of XME, the
transmission of the frame is terminated with an abort sequence and the CPU is notified
by interrupt ISR1.XDU (ISR4.XDU2, ISR5.XDU3). The frame can be aborted by software
using CMDR.SRES (CMDR3.SRES2, CMDR4.SRES3).
The data transmission sequence, from the CPU’s point of view, is outlined in
User’s Manual
Hardware Description
Transmit Direction
®
Receive Address Pushed to RFIFO
HDLC Data Transmission
56 does not check whether the length of the frame, i.e. the number of bytes
216
Signaling Controller Operating Modes
®
56 will repeatedly
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
Figure
®
82.
56
Related parts for pef2256e
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
MERRIMAC [Merrimac Industries, Inc.]
Datasheet:
Part Number:
Description:
Antenna Switch Silicon Pin Diode
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Silicon Switching Diodes
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Single Igbt Driver Ic
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Igbt Modules
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Igbt Modules
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Igbt Modules
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
5 Volt Standard Regulator
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Active Biased Transistor
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
N-channel Small Signal Mosfet 20v?800v
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Sipmos Small-signal Transistor
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Complementary Mosfets 60v Small-signal-transistor
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
Complementary Mosfets 60v
Manufacturer:
Infineon Technologies Corporation
Datasheet:
Part Number:
Description:
P-channel Mosfets Power-transistor
Manufacturer:
Infineon Technologies Corporation
Datasheet: