Samsung S5PC100 User Manual page 222

S5PC100 USER'S MANUAL (REV1.0) Power Management
6.3 USB OTG PHY
Recommended power up sequence is shown in Figure 2.4-3.
Figure 2.4-3 Power Up Sequence of USB OTG Phy
USB OTG phy has three power modes: Run, IDLE, and Suspend mode.
• In Run mode, USB OTG phy sends and receives data normally.
• In IDLE mode, there is no data transaction to and from USB OTG phy. But, the clock is still supplied to USB
OTG phy.
• In Suspend mode, USB OTG phy clock is off to save power.
2.4-23