LG HB620 Service Manual

USB
The MSM6280 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
MSM6280 was designed to comply with the definition of a peripheral as specified in USB Specification,
Revision 2.0. Therefore, by definition, the USB interface is also compliant as a peripheral with the USB
Specification, Revision 2.0. The USB Specification Revision 2.0 defines three speeds of operation,
namely low-speed (1.5 Mbps) and full-speed (12 Mbps), and hi-speed(480Mbps). HB620T supports
low-speed and full-speed.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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[Table 3.9] 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
N23
USB_DAT_VP
N26 N25
USB_OE_TP_N USB_SE0_VM MMC_DATA_SDCC_DAT0_GPIO32
M16
MMC_CLK_SDCC_CLK_GPIO31 MMC_CMD_GPIO30
H14
L14
GPIO40
D6 D7
GPIO42
USB_OE_N
MICROSD_CMD
MICROSD_DATA(0)
MICROSD_CLK
PS_HOLD
USB_SE0
USB_DAT
PM_INT_N
USB_VBUS
USB_VBUS
17
USB_DAT
18
USB_D_P
USB_SE0
19
20
USB_D_M
21
GP1_DRV_N(MPP7)
USB_ID
11
12
VREG_5V
13
USB_OE_N
14
VSW_5V
15
USB_CTL_N
16
R409
47K
4.7u
C424
USB_OE_N
USB_CTL_N
USB_DAT
USB_D+
USB_SE0
USB_D-
[Fig. 3.20] Schematic of USB block(MSM6280 Side & PM6650 Side)
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LG HB620 Specifications

General

Brand	LG
Model	HB620
Category	Cell Phone
Language	English