Huawei Ascend Maintenance Manual

Y210 Mobile Phone
Maintenance Manual
9 Principles and Failure Analysis
Issue 1.0 (2012-11-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
38
Table 9-10 describes the signals' definitions.
Table 9-10 Signal definitions
Category
Description
Name in the
Circuit
Network
MSM7225A
GPIO/PM8029 MPP
Power supply
Digital power supply
input
VREG_S3
VREG_S3 (PM8029)
Analog power input
VREG_L12_2P8
5
VREG_L12_2P85
(PM8029)
Data
MIPI data
MIPI_DSI_LAN
E1_P
MIPI_DSI_LANE1_P
MIPI data
MIPI_DSI_LAN
E1_N
MIPI_DSI_LANE1_N
Synchronization
signal
Frame
synchronization clock
MDP_VSYNC_
P
GPIO97
Clock signal
MIPI clock
MIPI_DSI_CLK
_P
MIPI_DSI_CLK_P
MIPI clock
MIPI_DSI_CLK
_N
MIPI_DSI_CLK_N
Control signal
Reset
LCD_RESET_N
GPIO129
Identification
signal
LCD model
identification
LCD_ID0
GPIO9 (PM8029)
LCD model
identification
LCD_ID1
GPIO10 (PM8029)
Y210's LCD backlight control:
The Y210 uses a 3.5-inch LCD whose backlight is provided by six LEDs connected in series.
The backlight LEDs are controlled by the backlight driver chip TPS61160A. The ground
resistance of the driver chip pin FB is set to 10 Ω, providing up to 20 mA current to the LEDs
(duty:100%). The backlight brightness (driver output current) is controlled by the PWM
signal.

Huawei Ascend Specifications

General

Brand	Huawei
Model	Ascend
Category	Cell Phone
Language	English