Huawei Ascend Maintenance Manual page 43

Y210 Mobile Phone
Maintenance Manual
Table 9-10 describes the signals' definitions.
Table 9-10 Signal definitions
Category
Power supply
Data
Synchronization
signal
Clock signal
Control signal
Identification
signal
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.
Issue 1.0 (2012-11-28)
Description
Digital power supply
input
Analog power input
MIPI data
MIPI data
Frame
synchronization clock
MIPI clock
MIPI clock
Reset
LCD model
identification
LCD model
identification
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Copyright © Huawei Technologies Co., Ltd.
9 Principles and Failure Analysis
Name in the MSM7225A
Circuit GPIO/PM8029 MPP
Network
VREG_S3 VREG_S3 (PM8029)
VREG_L12_2P8 VREG_L12_2P85
5 (PM8029)
MIPI_DSI_LAN MIPI_DSI_LANE1_P
E1_P
MIPI_DSI_LAN MIPI_DSI_LANE1_N
E1_N
MDP_VSYNC_ GPIO97
P
MIPI_DSI_CLK
MIPI_DSI_CLK_P
_P
MIPI_DSI_CLK MIPI_DSI_CLK_N
_N
LCD_RESET_N GPIO129
LCD_ID0 GPIO9 (PM8029)
LCD_ID1 GPIO10 (PM8029)
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