LG L602i Service Manual page 43

3. TECHNICAL BRIEF
3.10.2.3. USB
The MSM6250A 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
MSM6250A 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 MSM6250A. U880's USB interface uses the PM6650-2 internal logic for USB
Transceiver.
Name
USB_RCV
USB_DAT
USB_SE0
USB_OE_N
USB_VBUS
USB_D+
USB_D-
MSM6250A
MSM6250A_USB Block
Figure. Schematic of USB Block (MSM6250 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
USB_OE_N
USB_DAT
USB_SE0
Figure. SIM Interface
PM6650-2_USB Block
VREG_5V
L403
+VPWR
4.7uH
USB_VBUS
R219 2.2K
R220 2.2K
- 44 -
USB_VBUS
USB_D+
PM6650-2
USB_D-
D401
C424 4.7u
RB521S-30
USB_DAT
R406 C425
2.2K 4.7u
1608
IO
Connector
VREG_5V
13
USB_OE_N
USB_OE_N
14
VSW_5V
15
USB_CTL_N
16
USB_VBUS
17
USB_DAT
18
USB_D+
USB_D_P
19
USB_SE0 USB_SE0
20
USB_D-
USB_D_M
21
GP1_DRV_N(MPP7)