LG KE820 Service Manual page 30

EBU_WAIT_n
EBU_SDCLKO
EBU_SDCLKI
EBU_BFCLKO
EBU_BFCLKI
EBU_CKE
SSC1_SCLK
T_OUT0
GPIO_44
T_OUT2
T_OUT3
T_OUT4
EINT3
T_OUT6
GPIO_50
GPIO_51
CC1CC3IO
GPIO_53
GPIO_54
GPIO_55
RF_STR0
GPIO_57
RF_DATA
RF_CLK
System port
AFC
CLKOUT0 [<=26MHz]
F26M
_WAIT
SDCLKO
SDCLKI
BFCLKO
BFCLKI
CKE
F_DPD
TXON_PA
VIBRATOR_EN
PA_BAND
ANT_SW1
ANT_SW2
ANT_SW3
MODE
KP_OUT(4)
AU_PWR_EN
LCD BACKLIGHT
JACK_DETECT
_FM_RESET
AF_PWR_EN
EN
TF_DETECT
DA
CLK
AFC
Not Use
26MHZ_MCLK
- 31 -
3. TECHNICAL BRIEF
RF Power amp turn on
Vibrator enable(High: enable, Low:disable)
RF band select
RF FEM control signal 1
RF FEM control signal 2
RF FEM control signal 3
For RF
Key pad
Audio amp power enable( active high)
LCD Backlight Control
For Headset Detect(High:
unplugged, Low: plugged)
FM Radio chip reset
Auto focus power enable( active high)
RF Transceiver chip enable
Micro SD card detect (High:
inserted, Low: ejected)
RF Transceiver chip data
RF Transceiver chip clock
Automatic Frequency control DAC
output for 26MHz VCTCXO
Baseband processor PLL
input Main clock