3. TECHNICAL BRIEF
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The backlight of LCD module is controlled by DBB via TPS60230RGTR , U400. The control signals
related to Backlight LED are given bellow.
Signals Description
LCD_DIM_CTL
(GPO 5)
LCD_LED_CTL
LCD_LED_GND
LCD_BL_EN
Control LCD backlight level in 16 steps
Control LCD LED
It Controls back-light of LCD module. (GPO_223)
Table 3-4 DESCRIPTION OF LCD BACKLIGHT LED CONTROL
C. RF interface
The AD6527 control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW2 , CLKON
, PA_EN, S_EN, S_DATA, S_CLK, RF_PWR_DWN.
Signal Description
PA_BAND (GPO 17) PAM Band Select
ANT_SW3 (GPO 11) Antenna switch Band Select
PA_EN (GPO 16) PAM Enable/Disable
S_DATA (GPO 20) Serial Data to PLL
S_CLK (GPO 21) Clock to PLL
S_EN (GPO 19) PLL Enable/Disable
RF_PWR_DWN(GPO 4) Power down Input
ANT_SW1 (GPO 9) Antenna switch Band Select
ANT_SW2 (GPO 10) Antenna switch Band Select
CLKON RF LDO Enable/Disable
Table 3-5 RF CONTRON SIGNALS DISCRIPTION
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