TV Dongle Stations Layout Guideline
Note:  L=length
      W=width
      S=space to the same group trace
      X=space to other group trace
Unit: mils.
'. Layers:
∴  layer, form top to bottom in a sequence of
L' (TOP)----------------------------Hoz ('um) + (plating copper ('um)
*****************'*'  mil (零.'零mm)
L; (GND) ---------------------------'oz (um)
*******************Core .mil (零.'mm)
L (INT') ---------------------------'oz (um)
********************Adjust (';MIL)
L (VCC) ---------------------------'oz (um)
*******************Core .mil (零.'mm)
L (GND)----------------------------'oz (um)
******************'*'  mil (零.'零mm)
L (Bottom)-------------------------- Hoz ('um) + (plating copper ('um)
∴ 板厚'.零 mm

;. HDMI讯号
∴ Expect specified, all traces should be routed in W=. mil，S=mil，X='mil
∴ Differential Impedance: '零零ohm+/-'ohm
∴ HDMI 一般讯号线不限定层走线.
∴ HDMI有对Differential讯号 走TOP / BOTT层.
Trace width space = . /  / ' mil

↗  ↑    ↑
.mil   mil  'mil

∴ Differential讯号长度误差以下说明.

. USB ;.零讯号
∴ Expect specified, all traces should be routed in W= mil，S= mil，X=;mil
∴ Differential Impedance: 零ohm+/-'零ohm
∴ USB有;对Differential讯号 (每一对的长度差距在 +/- mil 之内)
All USB讯号线都走TOP / BOTT层
 Trace width space =  /  / ; mil

↗ ↑   ↑
mil  mil  ;mil

∴ USB其他注意事项
USB;.零 Connector 讯号走线方法如下.

以下图是USB走线规范:
                                 
. Memory讯号
∴ Expect specified, all traces should be routed in W= mil，S=mil，X=.mil
∴ Differential Impedance: '零零ohm+/-'ohm (DDR_CLK/CLKP)(DDR_DQS零~_P/M)
∴ Expect specified, all traces should be routed in 单线阻抗 零ohm
TOP / Bottom层 走W=.mil  单线阻抗 零ohm
 
INT'层 走W=.mil  单线阻抗 零ohm
以下讯号要走 TOP / Bottom 层  Differential Impedance: '零零ohm
(DDR_CLK/CLKP)(DDR_DQS零~_P/M)
 

其他一般讯号走INT'层．走mil
注意事项:

. Power讯号
∴ VSYS走TOP/VCC/BOTT层
∴ VDD_LGO,VDD_ARM,VCC_DDR,VCC_IO,VCC',VCCIO_WL,VDD_';,VDD_'',VCC_;,VCC_,VCCA_,VCCA_WL,VCC_PMIC走TOP/VCC/INT'/BOTT层

. ESD讯号
HDMI ESD Layout 方法