FX3 CYUSB3014-BZXC 并口布线规则请教

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haines
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Dear ifx teams: 1、usb的并口控制信号,就是USB_PHY_CTL【0-12】组内等长,误差±5mil;usb的并口数据,就是USB_PHY_DQ【0-31】组内等长,误差±5mil,这个等长合理吗? 2、USB_PHY_CLK和数据线等长还是和控制线等长? 3.并口的阻抗需要控制吗 --- AN70707 page 14 ,讲的不是很清楚,谢谢指导!
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JiangJing
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Hi,

      那FX3所有的GPIF line都是 length-matched(包括数据线,控制线跟clk), 误差在500mils以内;

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JiangJing
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Hi,

      USB_PHY_CTL【0-12】跟USB_PHY_DQ【0-31】指的是FX3 GPIF线吗(CTL跟DQ)? 如果是的话,线长的误差是500 mils内,不是5mil; USB_PHY_CLK指的是PCLK吗?

GPIF并行口需要串联终端电阻,我们推荐的是22欧姆。GPIF line不超过5 inches

 

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haines
Level 4
Level 4
Distributor - Zenitron(GC)
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FX3 GPIF线吗(CTL跟DQ)?是     ,USB_PHY_CLK指的是PCLK吗?是  ,  SB_PHY_CLK指的是PCLK吗? 是

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JiangJing
Moderator
Moderator
Moderator
First like given 250 sign-ins 250 replies posted

Hi,

      那FX3所有的GPIF line都是 length-matched(包括数据线,控制线跟clk), 误差在500mils以内;

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