Usb Host - Samsung S5PV210 Hardware Design Manual

S5PV210_HARDWARE DESING GUIDE REV 1.0

14. USB Host

14.1. Singnal Description
Ball Name
XUHOSTPWREN
XUHOSTOVERCUR
XUHOSTDP
XUHOSTREXT
XUHOSTDM
14.2. Power Domain
VDD_UHOST_A is for USB Host Phy analog power supplied with 3.3V, and VDD_UHOST_D is for USB Host Phy
digital power supplied with 1.1V.
Caution! VDD_UHOST_D must be brought up first, followed by VDD_UHOST_A, in order to limit power
consumption and prevent voltage stress on the device.
14.3. Circuit Diagram Example
To minimize power consumption in USB Host block, SEC recommends that user should control powers for
VDD_UHOST_A and VDD_UHOST_D.
(1) use Charge Pump Circuit or connect B'd 5V power to VBUS in order to supply VBUS to a bus-powered
USB device.
(2) connect regulator's nOC in to XuhOVERCUR in order to detect over-current condition.
I/O Description
O USB HOST charge pump enable
I USB HOST over current flag
IO USB HOST Data pin DATA(+)
IO USB HOST External 44.2ohm (+/- 1%) pull-down
IO USB HOST Data pin DATA(-)
102