LG M6100 Service Manual - Page 26

C. RF interface

Page 26 highlights

3. TECHNICAL BRIEF The backlight of LCD module is controlled by DBB via AAT2807AIXN-4.5, U802. The control signals related to Backlight LED are given bellow. Signals LCD_DIM_CTL (GPO 23) LCD_LED_CTL LCD_LED_GND Description Control LCD backlight level in 16 steps Control LCD LED Table 3-3. DESCRIPTION OF LCD BACKLIGHT LED CONTROL C. RF interface The AD6527B control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW3 , CLKON , PA_EN, S_EN, S_DATA, S_CLK, RF_PWR_DWN. Signals Description PA_BAND (GPO 17) PAM Band Select ANT_SW1 (GPO 9) Antenna switch Band Select ANT_SW2 (GPO 11) Antenna switch Band Select ANT_SW3 (GPO 10) Antenna switch Band Select CLKON RF LDO Enable/Disable PA_EN (GPO 16) PAM Enable/Disable S_EN (GPO 19) PLL Enable/Disable S_DATA (GPO 20) Serial Data to PLL S_CLK (GPO 21) Clock to PLL RF_PWR_DWN(GPO 4) Power down Input Table 3-4. RF CONTROL SIGNALS DESCRIPTION - 27 -

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3. TECHNICAL BRIEF
- 27 -
The backlight of LCD module is controlled by DBB via AAT2807AIXN-4.5, U802. The control signals
related to Backlight LED are given bellow.
C. RF interface
The AD6527B control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW3 , CLKON ,
PA_EN, S_EN, S_DATA, S_CLK, RF_PWR_DWN.
Signals
Description
LCD_DIM_CTL
Control LCD backlight level in 16 steps
(GPO 23)
LCD_LED_CTL
Control LCD LED
LCD_LED_GND
Table 3-3. DESCRIPTION OF LCD BACKLIGHT LED CONTROL
Signals
Description
PA_BAND (GPO 17)
PAM Band Select
ANT_SW1 (GPO 9)
Antenna switch Band Select
ANT_SW2 (GPO 11)
Antenna switch Band Select
ANT_SW3 (GPO 10)
Antenna switch Band Select
CLKON
RF LDO Enable/Disable
PA_EN (GPO 16)
PAM Enable/Disable
S_EN (GPO 19)
PLL Enable/Disable
S_DATA (GPO 20)
Serial Data to PLL
S_CLK (GPO 21)
Clock to PLL
RF_PWR_DWN(GPO 4)
Power down Input
Table 3-4. RF CONTROL SIGNALS DESCRIPTION