ORT82G5-1BM680C LATTICE [Lattice Semiconductor], ORT82G5-1BM680C Datasheet - Page 23
![no-image](/images/no-image-200.jpg)
ORT82G5-1BM680C
Manufacturer Part Number
ORT82G5-1BM680C
Description
0.6 to 3.7 Gbps XAUI and FC FPSCs
Manufacturer
LATTICE [Lattice Semiconductor]
Datasheet
1.ORT82G5-1BM680C.pdf
(119 pages)
- Current page: 23 of 119
- Download datasheet (2Mb)
Lattice Semiconductor
ORCA ORT42G5 and ORT82G5 Data Sheet
alignment will only occur when the communication channel is synchronized. When there is no synchronization of
the link, the 1:4 DEMUX will continue to output 4-byte words at some arbitrary, but constant, boundary.
There are 2 control register bits available for each channel for word alignment. They are DOWDALGN_xx and
NOWDALGN_xx. The DOWDALGN_xx bit is positive edge triggered. Writing a 0 followed by a 1 to this register bit
will cause the corresponding DEMUX to look for a new comma character and align the 32-bit word such that the
comma is in the most significant byte position. It is important that the comma is in the most significant byte position
since the multi-channel aligner looks for comma in the most significant byte only.
Typically, it is not necessary to set the DOWDALGN_xx bit. When the link state machine loses synchronization
(DEMUXWAS_xx register bit is 0), the DEMUX block automatically looks for a new comma character irrespective of
whether the DOWDALGN_xx bit is set or not. However, as discussed earlier, the comma character may become
misaligned without the Fibre Channel link state machine indicating a loss of synchronization. In such cases, the
DOWDALGN_xx bit must be toggled to force resynchronization.
The NOWDALGN_xx bit is a level-sensitive bit. If it is a 1, then the DEMUX does not dynamically alter the word
boundary based on comma and SWDSYNC_xx output of the SERDES. This might be useful if a channel were con-
figured to bypass the multi-channel alignment FIFO and raw 40-bits of data are directed from SERDES to FPGA.
In Fibre Channel mode, the default setting (NOWDALGN_xx = 0) causes the word boundary to be set as soon as
the SERDES SWDSYNC_xx output is a 1 and a comma character has been detected. The character that is the
comma becomes the most-significant portion of the demultiplexed word. When the SERDES loses link synchroni-
zation it will drop SWDSYNC_xx low. The DEMUX will begin search for word alignment as soon as SWDSYNC_xx
goes to 1 again.
The DEMUX passes on to the channel alignment FIFO block a set of control signals that indicate the location of the
synchronizing event. RALIGN_xx[3:0] are these indicators. If there is no link synchronization, all of the
RALIGN_xx[[3:0] bits will be zeros independent of synchronizing events that come in. When the link is synchro-
nized, then the bit that corresponds to the time of the synchronization event will be set to a 1.
The relationship between a time sequence of values input at SRBDxx[7:0] to the values output at RWD_xx[39:0] is
shown in Figure 8. A parallel relationship exists between SRBDx[8] and RWBIT8_xx[3:0] as well as between
SRBD_xx[9] and RWBIT9_xx[3:0].
23
Related parts for ORT82G5-1BM680C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ORT82G5-G2-PAC-EV](/images/manufacturer_photos/0/3/380/lattice_tmb.jpg)
Part Number:
Description:
Programmable Logic IC Development Tools ORT82G5 ispGDX256 is pPAC PwrMgr 1208 BC
Manufacturer:
Lattice
![ort82g5](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
Xaui And Fc Fpscs
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL16V8D5LJ](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
IC PROGRAMMED LATTICE GAL 16V8
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![ISPLSI2032-80LT44](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
ISPLSI2032-80LT44Lattice Semiconductor [In-System Programmable High Density PLD]
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![TN1112](/images/no-image3.png)
Part Number:
Description:
Input Hysteresis in Lattice CPLD and FPGA Devices
Manufacturer:
LATTICE [Lattice Semiconductor]
Datasheet:
![GAL6002B-20LP](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL6001B-30LP](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL18V10B-15LP](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL16V8D-15LPI](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL16V8D-15LJI](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![ISPLSI2032-80LJI](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![GAL20XV10B-10LP](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![ISPLSI2096-80LQ](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![ISPLSI2064-100LT](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
![M4-128/64-15YC](/images/manufacturer_photos/0/3/382/lattice_semiconductor_corp__tmb.jpg)
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet: