參數(shù)資料
型號(hào)： ORT82G5-2BM680
廠商： LATTICE SEMICONDUCTOR CORP
元件分類： FPGA
英文描述： FPGA, 1296 CLBS, 380000 GATES, PBGA680
封裝： PLASTIC, BGA-680
文件頁數(shù)： 28/110頁
文件大?。?/td> 1459K
代理商： ORT82G5-2BM680
24
Lattice Semiconductor
Data Sheet
January 25, 2002
8b/10b SERDES Backplane Interface FPSC
ORCA ORT82G5 1.0-1.25/2.0-2.5/3.125-3.5 Gbits/s
Backplane Transceiver Core Detailed Description (continued)
XAUI Link Synchronization Function
For each lane, the receive section of the XAUI link state machine incorporates a synchronization state machine that
monitors the status of the 10-bit alignment. A 10-bit alignment is done in the SERDES based on a comma charac-
ter such as K28.5. A comma (0011111 or its complement 1100000) is a unique pattern in the 10-bit space that can-
not appear across the boundary between any two valid 10-bit code-groups. This property makes the comma useful
for delimiting code-groups in a serial stream.This mechanism incorporates a hysteresis to prevent false synchroni-
zation and loss of synchronization due to infrequent bit errors. For each lane, the sync_complete signal is disabled
until the lane achieves synchronization. The synchronization state diagram is shown in Figure 1. Table 1 and Table
2 describe the state variables used in Figure 1.
Table 6. XAUI Link Synchronization State Diagram Notation—Variables
Table 7. XAUI Link Synchronization State Diagram—Functions
Variable
Description
sync_status
FAIL: Lane is not synchronized (correct 10-bit alignment has not been established).
OK: Lane is synchronized.
OK_NOC: Lane is synchronized but a comma character has not been detected in the past TBD
seconds.
enable_CDET TRUE: Align subsequent 10-bit words to the boundary indicated by the next received comma.
FALSE: Maintain current 10-bit alignment.
gd_cg
Current number of consecutive cg_good indications.
Function
Description
sync_complete
Indication that alignment code-group alignment has been established at the boundary indicated
by the most recently received comma.
cg_comma
Indication that a valid code-group, with correct running disparity, containing a comma has been
received.
cg_good
Indication that a valid code-group with the correct running disparity has been received.
cg_bad
Indication that an invalid code-group has been received.
no_comma
Indication that comma timer has expired. The timer is initialized upon receipt of a comma.
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OS10040280G-012 FIBER OPTIC RECEIVER, 1290-1600nm, PANEL MOUNT, FC/APC CONNECTOR
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ORT82G5-2F680I 功能描述:FPGA - 現(xiàn)場(chǎng)可編程門陣列 ORCA FPSC 2.7GBITS/s BP XCVR 643K RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256
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