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service:hardware:appnote:connectusbhost

Connect USB-Host-Connector to a Trizeps

Schematic

Typical connection of USB-Host-Connector

  • Place 15K pull-downs near USB-connector.
  • For best compatibility with all modules, mount R24 and R29.
  • For a cheap solution, where overcurrent-detection is not needed - i.e. when using on-board USB-devices - U10 may be ommited. Though the Trizeps has a weak pull-up on USB_OC1 and USB_OC2 pins, an extra pull-up is recommended. Note that those pull-ups need to be connected to +3,3V and not +5V!

Signals

Signal-Name SODIMM-Pin Remark
USB_DP1 143 USB-differential Port 1
USB_DM1 145 USB-differential Port 1
USB_DP2 139 USB-differential Port 2
USB_DM2 141 USB-differential Port 2
USB_PEN1 129 USB-Port 1 power enable
USB_PEN2 127 USB-Port 2 power enable
USB_OC1 131 USB-Port 1 overcurrent-detect
USB_OC2 133 USB-Port 2 overcurrent-detect
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service/hardware/appnote/connectusbhost.txt · Zuletzt geändert: 2011/06/08 13:01 von