一.网络类(NetClasses)的组建:方法一:原理图中执行Place——Directives——NetClass按Tab键,设置好相关名称属性回车,每个归属此类网络均要放置。方法二:PCB中执行Design——Classes…命令,按下图右键执行NetClasses——AddClass命令会生产NewClass,右键更名成所需要的网络类名称,单击添加归属于此网络类的网络成员。二.差分网络类(DifferentialPairClasses)的组建:方法一:原理图中执行Place——Directives——DifferentialPair按Tab键,设置好相关名称属性回车,每个归属此类网络均要放置。方法二:步骤1:PCB中执行Design——Classes…命令,按下图右键执行DifferentialPairClasses——AddClass命令会生产NewClass,右键更名成所需要的差分网络类名称,单击添加归属于此网络类的网络成员(前提是需要事先建立差分对网络)。步骤2:建立差分对网络,PCB中执行View——WorkspacePanels——PCB——PCB命令打开PCB面板,面板切换至DifferentialPairsEditor,点击选择相应的差分网络类后再点击按钮Add,输入自定义的网络差分对名称,同时设置定义好对应的差分网络(PositiveNet和NegativeNet)。也可以通过双击DifferentialPairsEditor面板中的差分网络类或执行Design——Classes…命令,把所建立的差分网络对归属到对应的差分网络类。三.ROOM相关:1.ROOM的组建:主要目的是用于设置个别器件内部的铺铜或布线间距。PCB中执行Design——Rooms——PlaceRectangularRoom命令,按Tab键,设置好相关名称属性,在PCB中相应的器件封装上面画好Room区域。2.原理图导入PCB时是否生产单页ROOM在PCB中执行Project——ProjectOptions…把下图中框选的勾选项来决定是否生成原理图单页ROOM四.PCB设计规则设置:1.间距(Clearance)设置:2.线宽(Width)设置:3.差分对布线(DifferentialPairsRouting)设置:4.5.6.7.设计规则优先级的调整:同一类规则的优先级栏数字越小则优先级越高,可以通过调整面板左下角的Priorties按钮调整优先级。五.PCB网络等长及阻抗说明:1.MDIO差分网络组:差分阻抗100欧,线宽距6/9mil,差分网络等长1070mil,误差+/-10mil,起始参照网络差分组MDIO3_P/N;2.GMAC网络组:阻抗50欧,线宽距7/7mil,网络等长2455mil,误差+/-10mil,起始参照网络GMAC_RXDV;3.LCDMIPI差分网络组:差分阻抗100欧,线宽距6/9mil,差分网络等长1785mil,误差+/-10mil,起始参照网络差分组MIPI_D3P/N;4.SLVDS差分网络组:差分阻抗100欧,线宽距6/9mil,差分网络等长1620mil,误差+/-10mil,起始参照网络差分组LVDS_Y0P/N;5.SDCARD0网络组:阻抗50欧,线宽距7/7mil,网络等长1380mil(参照SD0_CLK网络),加上上拉布线网络等长1535mil,误差+/-10mil;6.RGB_M1网络组:使用板对板连接器SCSI40P_1.27_MALE,封装PIN针脚四行,行距75mil,因连接器内部针脚长度差异,PCB布线时每行需要依次增减75mil以调整布线总长。起始布线参照网络LCD_CLK;[LCD_R7,LCD_R5,LCD_R3,LCD_R1,LCD_CLK],阻抗50欧,线宽距7/7mil,网络等长3100mil,误差+/-10mil;[LCD_G0,LCD_R6,LCD_R4,LCD_R2,LCD_R0],阻抗50欧,线宽距7/7mil,网络等长3100-75x1=3025mil,误差+/-10mil;[LCD_G2,LCD_G4,LCD_G6,LCD_B0,LCD_B2,LCD_B4,LCD_B6,LCD_DE,LCD_HSYNC],阻抗50欧,线宽距7/7mil,网络等长3100-75x2=2950mil,误差+/-10mil;[LCD_G1,LCD_G3,LCD_G5,LCD_G7,LCD_B1,LCD_B3,LCD_B5,LCD_B7,LCD_VSYNC],阻抗50欧,线宽距7/7mil,网络等长3100-75x3=2875mil,误差+/-10mil;7.DLVDS差分网络组:差分阻抗100欧,线宽距6/9mil,差分网络等长1110mil,误差+/-10mil,起始参照网络差分组RXINO+/-;8.B_RGB网络组:使用板对板连接器SCSI40P_1.27_FEMALE,封装PIN针脚四行,行距75mil,因连接器内部针脚长度差异,PCB布线时每行需要依次增减75mil以调整布线总长。起始布线参照网络LCD_DE;[LCD_G1,LCD_G3,LCD_G5,LCD_G7,LCD_B1,LCD_B3,LCD_B5,LCD_B7,LCD_VSYNC],阻抗50欧,线宽距7/7mil,网络等长2140-75x1=2065mil,误差+/-10mil;[LCD_G2,LCD_G4,LCD_G6,LCD_B0,LCD_B2,LCD_B4,LCD_B6,LCD_DE,LCD_HSYNC],阻抗50欧,线宽距7/7mil,网络等长2140mil,误差+/-10mil;[LCD_G0,LCD_R6,LCD_R4,LCD_R2,LCD_R0],阻抗50欧,线宽距7/7mil,网络等长2140+75x1=2215mil,误差+/-10mil;[LCD_R7,LCD_R5,LCD_R3,LCD_R1,LCD_CLK],阻抗50欧,线宽距7/7mil,网络等长2140+75x2=2290mil,误差+/-10mil;9.RGB_M2网络组:使用板对板连接器SCSI40P_1.27_MALE,封装PIN针脚四行,行距75mil,因连接器内部针脚长度差异,PCB布线时每行需要依次增减75mil以调整布线总长。起始布线参照网络LCD_R0;[LCD_R7,LCD_R5,LCD_R3,LCD_R1,LCD_CLK],阻抗50欧,线宽距7/7mil,网络等长3025+75x1=3100mil,误差+/-10mil;[G0,LCD_R6,LCD_R4,LCD_R2,LCD_R0],阻抗50欧,线宽距7/7mil,网络等长3025mil,误差+/-10mil;[G2,G4,G6,B0,B2,B4,B6,LCD_DE,LCD_HSYNC],阻抗50欧,线宽距7/7mil,网络等长3025-75x1=2950mil,误差+/-10mil;[G1,G3,G5,G7,B1,B3,B5,B7,LCD_VSYNC],阻抗50欧,线宽距7/7mil,网络等长3025-75x2=2875mil,误差+/-10mil;六.走线式铺铜网络备注,避免遗忘:1.BL-VDD_TF_3V32.TL-VSYS_IN3.BL-VSYS_IN4.BL-D3V3_HUB5.BL-VDD_PHY_3V36.TL-VDD_5V47.BL_I2S_D3V38.TL_VDD_5VTL_VDD_5V9.TL_NetD5_210.BL_VDD_5VBL_VDD_5V11.TL_VDD_CORE12.BL_VDD_12V