LG KU950 Service Manual page 44

3.10.2.3. USB
The MSM6275 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 MSM6275 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 MSM6275.
KU950's USB interface uses the PM6650 internal logic for USB Transceiver.
Name
USB_RCV
USB_DAT
USB_SE0
USB_OE_N
USB_VBUS
USB_D+
USB_D-
MSM6275
MSM6275_USB Block
Figure. Schematic of USB block (MSM6275 Side & PM6650 Side)
Note
Rx_Data to MSM
Data to/from MSM
Data to/from MSM
Out-Put Enable of Transceiver
USB_Power From Host(PC)
USB Data+ to Host
USB Data- to Host
Table. USB signal interface
USB_OE_N
USB_DAT
PM6650
USB_SE0
Figure. USB Interface
USB_VBUS
D602
RB521S-30
R609
C621
4.7u
- 45 -
3. TECHNICAL BRIEF
USB_VBUS
USB_D+
USB_D-
PM6650_USB Block
USB_OE_N
USB_CNT_N
USB_DAT
C622 USB_D+
1u USB_SE0
47K
USB_D-
+VPWR
KYPD_LED_EN
PM_ON_SW_N
MOTOR_PWR-
USIM_P_DATA
MMI
Connector
11
USB_ID
12
VREG_5V
13
USB_OE_N
14
VSW_5V
15
USB_CTL_N
16
USB_VBUS
17
USB_DAT
18
USB_D_P
19
USB_SE0
20
USB_D_M
21
GP1_DRV_N(MPP7)