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
Содержание B2050
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Страница 53: ... 52 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM 4 TROUBLE SHOOTING ...
Страница 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Страница 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Страница 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Страница 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
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