3. TECHNICAL BRIEF
- 22 -
The backlight of LCD module is controlled by AD6720 via AAT3157 , U404. The control signals related
to Backlight LED are given bellow.
C. RF interface
The AD6720 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
MLED
Current source for backlight LED
LCD_DIM_CTL
Control LCD backlight level in 16 steps
MLED[1:2]
This pins are returned-paths for backlight LED current source (MLED)
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
RF_PWR_DWN(GPO 4)
Power down Input
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
Table 3-4. RF CONTROL SIGNALS DESCRIPTION
Содержание KG225
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model KG225 Service Manual KG225 M O B ILE CAM E R A ...
Страница 3: ... 4 ...
Страница 19: ...3 TECHNICAL BRIEF 20 Figure 3 4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE ...
Страница 66: ...4 TROUBLE SHOOTING 67 4 12 KEY backlight Trouble Q300 R359 TEST POINT Figure 21 ...
Страница 79: ... 80 5 DOWNLOAD B Multi Download Procedure 1 Run GSM Multi Download program and select Setting ...
Страница 82: ... 83 5 DOWNLOAD 7 Check if the ADI option is set to Hermes 8 Press OK to end Configuration Select Rate ...
Страница 84: ... 85 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Страница 85: ... 86 ...
Страница 92: ... 93 KG225 8 PCB LAYOUT ...
Страница 93: ... 94 KG225 8 PCB LAYOUT ...
Страница 101: ... 102 10 STAND ALONE TEST Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 109: ... 110 ...
Страница 125: ...Note ...
Страница 126: ...Note ...