LG CU920 - Page 65

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3. TECHNICAL BRIEF
3.10.2.3 USB
The MSM6281 device contains a Universal Serial Bus (USB) interface to provide an efficient
interconnect between the mobile phone and a personal computer (PC). The USB interface of the
MSM6281 was designed to comply with the definition of a peripheral as specified in USB Specification,
Revision 1.1. Therefore, by definition, the USB interface is also compliant as a peripheral with the USB
Specification, Revision 2.0.
The USB Specification Revision 1.1 defines two speeds of operation, namely low-speed (1.5 Mbps)
and full-speed (12 Mbps), both of which are supported by the MSM6281.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
N23
USB_SE0_VM
N26
USB_DAT_VP USB_OE_TP_N
N25
USB_DAT
USB_OE_N
USB_SE0
1608
47KR707
2.2u
C723
21
GP1_DRV_N(MPP7)
VSW_5V
14
USB_CTL_N
15
USB_VBUS
16
USB_DAT
17
USB_D_P
18
USB_SE0
19
USB_D_M
20
USB_OE_N
13
USB_CTL_N
USB_OE_N
USB_VBUS
USB_DAT
USB_D+
USB_SE0
USB_D-
Figure. Schematic of USB block(MSM6281 Side & PM6650 Side)
Table. USB Signal Interface
Name Note
USB_DAT Data to/from MSM
USB_SE0 Data to/from MSM
USB_OE_N Out-Put Enable of Transceiver
USB_VBUS USB_Power From Host(PC)
USB_D+ USB Data+ to Host
USB_D- USB Data- to Host