LG KF690 Service Manual page 56

3.10.10 USB interface
The ESM6270 device integrates a universal serial bus (USB) controller that supports both
unidirectional and bidirectional transceiver interfaces characteristics:
❏ Compliant with both the USB 2.0 Specification and the OTG Supplement
❏ Complies with 3-wire USB support only
❏ USB Transceiver integrated in PM6635 power management device
❏ Either low-speed (1.5Mbps) or full-speed (12Mbps) as a host
❏ In peripheral mode, PM6635 supports charging from VBUS
❏ ESM6270 with PM6635 also supports analog car kit mode (CEA-936-A)
USB_VBUS
R423
EAR_SENSE_N
0
RMT_ADC
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
USB_OE_N
USB_CNT_N
USB_DAT
C426
R412
USB_D+
4.7u
47K
USB_SE0
USB_D-
+VPWR
C447
0.01u
U404
FSUSB30UMX
10
SEL HSD1+
9
VCC HSD2+
8
_OE D+
7
HSD1- GND
6
HSD2- D-
R425
0
[Fig. 3.27] USB interface schematic
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3. TECHNICAL BRIEF
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
1
RMT_INT
2
USB_D+
D D
3
USB_D-
4
USB+_RINT
5
USB-_RADC
Route together
Route together
LGE Internal Use Only