参数资料
型号: LFXP2-17E-7F484C
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
中文描述: FPGA, 420 MHz, PBGA484
封装: 23 X 23 MM, FPBGA-484
文件页数: 29/92页
文件大小: 1701K
代理商: LFXP2-17E-7F484C
2-32
Architecture
Lattice Semiconductor
LatticeXP2 Family Data Sheet
DLL Calibrated DQS Delay Block
Source synchronous interfaces generally require the input clock to be adjusted in order to correctly capture data at
the input register. For most interfaces a PLL is used for this adjustment. However, in DDR memories the clock,
referred to as DQS, is not free-running, and this approach cannot be used. The DQS Delay block provides the
required clock alignment for DDR memory interfaces.
The DQS signal (selected PIOs only, as shown in Figure 2-30) feeds from the PAD through a DQS delay element to
a dedicated DQS routing resource. The DQS signal also feeds polarity control logic which controls the polarity of
the clock to the sync registers in the input register blocks. Figure 2-30 and Figure 2-31 show how the DQS transi-
tion signals are routed to the PIOs.
The temperature, voltage and process variations of the DQS delay block are compensated by a set of 6-bit bus cal-
ibration signals from two dedicated DLLs (DDR_DLL) on opposite sides of the device. Each DLL compensates
DQS delays in its half of the device as shown in Figure 2-30. The DLL loop is compensated for temperature, volt-
age and process variations by the system clock and feedback loop.
Figure 2-30. Edge Clock, DLL Calibration and DQS Local Bus Distribution
I/O Bank 5
I/O
Bank
6
I/O
Bank
7
I/O
Bank
2
I/O
Bank
3
I/O Bank 4
I/O Bank 0
I/O Bank 1
DDR_DLL
(Right)
DDR_DLL
(Left)
ECLK1
ECLK2
Delayed
DQS
Polarity Control
DQSXFER
DQS Delay
Control Bus
DQS Input
Spans 18 PIOs
Top & Bottom
Sides
Spans 16 PIOs
Left & Right Sides
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相关代理商/技术参数
参数描述
LFXP2-17E-7F484C8W 功能描述:FPGA - 现场可编程门阵列 17KLUTs 358I/O Inst- on DSP 1.2V -7Spd RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
LFXP2-17E-7FN484C 功能描述:FPGA - 现场可编程门阵列 17KLUTs 358 I/O Inst -on DSP 1.2V -6 Spd RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
LFXP2-17E-7FN484C8W 功能描述:FPGA - 现场可编程门阵列 17KLUTs 358I/O Inst -on DSP 1.2V -7 Spd RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
LFXP2-17E-7FT256C 功能描述:FPGA - 现场可编程门阵列 17KLUTs 201 I/O Inst -on DSP 1.2V -7 Spd RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
LFXP2-17E-7FT256C8W 功能描述:FPGA - 现场可编程门阵列 17KLUTs 201 I/O Inst -on DSP 1.2V -7 Spd RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256