[转载]6410的USB OTG外部电路连接分析

   USB Host

XuhDN（差分数据﹣）

Connect to USB Host Data Minus. 15Kohm Pull-down resistoris required.

Connect 15Kohm series resistor to GND.

XuhDP（差分数据+）

Connect to USB Hot Data plus . 15Kohm Pull-down resistor isrequired.

Connect 15Kohm series resistor to GND.

USBOTG

XusbDP（差分数据+）

Connect to USB Data pin DATA(+)

Leaveas a No Connect

XusbDM（差分数据﹣）

Connect to USB Data pin DATA(-)

Leaveas a No Connect

XusbXTI（晶振连接）

Connect to Crystal XI signal if using Crystal. Connect toGND if using Oscillator.

Connect to 1M Ohm resistor between XusbXTI and XusbXTO(case of using Crystal)

Connect to GND.

Connect like left column in order to supply 48MHz clock forother IPs (USB Host, IrDA, HSMMC, SPI)

XusbXTO（晶振连接0

Connect to Crystal/Oscillator XO signal

Connect to 1M Ohm resistor between XusbXTI and XusbXTO(caseof using Crystal)

Connect to GND

Connect like left column in order to supply 48MHz clock forother IPs (USB Host, IrDA, HSMMC, SPI)

XusbREXT

Connect to External 44.2ohm(+/- 1%) resistor toGND

Leaveas a No Connect

Connect like left column in order to supply 48MHz clock forother IPs (USB Host, IrDA, HSMMC, SPI

XusbVBUS（电源）

Connect USB mini-receptacle VBUS

Leaveas a No Connect

XusbID（身份认证）

Connect USB mini-receptacle Identifier .Device Mode : leaveas a no connect

Leaveas a No Connect

XusbDRVVBUS

Connect to Drive Vbus for Off-Chip Charge Pump. Device Mode: leave as a no connect

Leaveas a No Connect