3. TECHNICAL BRIEF
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The backlight of LCD module is controlled by DBB via AAT2807, U402. The control signals related to
Backlight LED are given bellow.
C. RF interface
The AD6527 control RF parts through PA_BAND, ANT_SW1, ANT_SW2, CLKON , PA_EN, S_EN,
S_DATA, S_CLK, RF_PWR_DWN.
Signals
Description
C_FLASH
Control flash ON and OFF
(GPIO_24)
LCD_DIM_CTL
Control LCD backlight level in 16 steps
(GPO 23)
FLASH_LED
Voltage source for FLASH LED
MLED
Current source for backlight LED
MLED[1:3]
This pins are returned-paths for backlight LED current source (MLED)
Table 3-4. 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
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) Tranceiver on/off control
Table 3-5. RF CONTRON SIGNALS DISCRIPTION
Summary of Contents for C2100
Page 1: ...Service Manual Model C2100 Service Manual C2100 P N MMBD0048201 Date April 2005 Issue 1 0 ...
Page 76: ...4 TROUBLE SHOOTING 77 4 10 KEY backlight Trouble Test Points Figure 4 21 ...
Page 104: ... 105 8 PCB LAYOUT ...
Page 105: ... 106 8 PCB LAYOUT ...
Page 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 117: ...Note 118 ...
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