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3. TECHNICAL BRIEF
The backlight of LCD module is controlled by AD6726 via AAT3155.
The control signals related to Backlight LED are given bellow.
C. RF interface
The AD6726 control RF parts through PA_BAND, ANT_SW , CLKON , PA_EN, S_EN, S_DATA,
S_CLK
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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Signals Description
MLED Current source for backlight LED
LCD_BACKLIGHT_CTRL Control LCD backlight level in 16 steps
MLED[1:2] This pins are returned-paths for backlight LED current source (MLED)
Table 3.5.B2 DESCRIPTION OF LCD BACKLIGHT LED CONTROL
Signals Description
PA_BAND (GPO 3) PAM Band Select
ANT_SW (GPO 9) Control logic level selection/ standby control
PA_EN (GPO 11) Tx/Rx Select
S_CLK (GPO 21) Clock to PLL
S_EN (GPO 19) PLL Enable/Disable
S_DATA (GPO 20) Serial Data to PLL
Table 3.5.C RF CONTROL SIGNALS DESCRIPTION
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