参数资料
型号: ORT82G5-2F680I
厂商: Lattice Semiconductor Corporation
文件页数: 61/119页
文件大小: 0K
描述: IC FPSC TRANSCEIVER 8CH 680-BGA
产品变化通告: Product Discontinuation 01/Aug/2011
标准包装: 24
系列: *
Lattice Semiconductor
ORCA ORT42G5 and ORT82G5 Data Sheet
46
Figure 26. Mixed Rate Transmit Clocking for a Single Block (Similar Connections Would Be Used for Block B)
Receive Clock Source Selection and Recommended Clock Distribution
In the receive path, one clock per bank of four channels, called RCK78[A:B], is sent to the FPGA logic. The control
register bits RCKSEL[0:1][A:B] are used to select the clock source for these clocks. The selection of the source for
RCK78[A:B] is controlled by these bits as shown in Table 18.
Table 18. RCK78[A:B] Source Selection
In the receive channel alignment bypass mode the data and recovered clocks for the eight channels (four per SER-
DES quad) are independent. The data for each channel are synchronized to the recovered clock from that channel.
Figure 27. - Receive Clocking for a Single Quad (Similar Connections Would Be Used for Quad B)
RCKSEL0
RCKSEL1
Clock Source
0
Channel A
1
0
Channel B
0
1
Channel C
1
Channel D
Common Logic, Quad A
Channel AA
Channel AB
Channel AD
Channel AC
REFCLK[P:N]_A
2
100 MHz
TCK78A
TSYS_CLK_AA
TSYS_CLK_AC
TSYS_CLK_AB
TSYS_CLK_AD
FPGA
Logic
Two Channels of
2.0 Gbps (Full-Rate)
Outgoing Serial Data
Channel AA Selected
as Clock Source
50 MHz
÷ 2
25 MHz
Two Channels of
1.0 Gbps (Half-Rate)
Outgoing Serial Data
Common Logic, Quad A
Channel AA
Channel AB
Channel AD
Channel AC
REFCLK[P:N]_A
2
156.25 MHz
RCK78A
RWCKAA
RWCKAC
RSYS_CLK_A1
RSYS_CLK_A2
FPGA
Logic
Four Channels of
3.125 Gbps
Incoming Serial Data
78.125 MHz
RWCKAB
RWCKAD
All Recovered
Clocks at
78.125 MHZ
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