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
Summary of Contents for B2050
Page 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Page 8: ... 7 2 PERFORMANCE ...
Page 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Page 10: ... 9 2 PERFORMANCE ...
Page 11: ... 10 2 PERFORMANCE ...
Page 12: ... 11 2 PERFORMANCE ...
Page 13: ... 12 2 PERFORMANCE ...
Page 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Page 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Page 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Page 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Page 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Page 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Page 97: ......
Page 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Page 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
Page 105: ......
Page 113: ...10 STAND ALONE TEST 112 ...
Page 117: ......
Page 119: ......
Page 132: ... 131 ...
Page 133: ... 132 ...