Intel PXA27 Series Design Manual page 152

'USB Client Controller
See Figure 12-7
pump device.
Figure 12-7. Connection to External OTG Charge Pump
1
USB Host
2
Controller
3
USB Device
Controller
D+,D-
UP2OCR[HXS]
UP2OCR[HXOE]
UP2OCR[CPVEN]
UP2OCR[CPVPE]
Vbus Valid 4.0 V
Vbus Valid 4.4 V
SRP Detect
Session Valid
UP2OCR[SE0S]
OTG ID
PXA27x Processor
II:12-10
for illustration of the PXA27x processor OTG connections to an external charge
USB
USBC_P / USBC_N
Transceiver
OE
USB_P2_4
USB_P2_8
USB_P2_5
USB_P2_3
USB_P2_1
USB_P2_2
USB_P2_7
Vbus Enable
Vbus valid 4.0 V
Vbus Pulsing
Vbus valid 4.4 V
Enable for SRP
SRP Detect
Session Valid
External Charge Pump
OTG ID
®
Intel PXA27x Processor Family Design Guide
To USB
Vbus