LG KG320 - Page 25

3. TECHNICAL BRIEF
- 26 -
3.4.1 Interconnection with external devices
A. RTC block interface
Countered by external X-TAL
The X-TAL oscillates 32.768KHz
B. RF interface
The AD6527B 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
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) Power down Input
Table 3-4. RF CONTROL SIGNALS DESCRIPTION