LG KG245 Service Manual page 24

C. RF interface
The AD6527 control RF parts through PA_BAND, ANT_SW1, ANT_SW2, CLKON , PA_EN, SEN,
SDATA, SCLK, RF_PWR_DWN.
Signals
PA_BAND (GPO 17)
ANT_SW1 (GPO 9)
ANT_SW2 (GPO 11)
CLKON
PA_EN (GPO 16)
S_EN (GPO 19)
S_DATA (GPO 20)
S_CLK (GPO 21)
RF_EN (GPO 4)
D. Key interface
Include 5 column , 5 row and additional GPIO 35 for KEY_ROW5. The AD6527 detects whether key
is pressed or not by using interrupt method.
E. AD6537B Interrupt
AD6537B provides an active-high interrupt output signal. Interrupt signals are generated by the
Auxiliary ADC, audio, and charger modules.
PAM Band Select
Antenna switch Band Select
Antenna switch Band Select
RF LDO Enable/Disable
PAM Enable/Disable
PLL Enable/Disable
Serial Data to PLL
Clock to PLL
Power down Input
Table 3-5. SIM CONTROL SIGNALS DESCRIPTION
- 25 -
3. TECHNICAL BRIEF
Description