LG KG110 - General Phone Functions; Making and Answering Calls

3. TECHNICAL BRIEF
D. SIM interface
The AD6720 provides SIM Interface Module. The AD6720 checks status periodically
during established call mode whether SIM card is inserted or not, but it doesn't check
during deep Sleep mode. In order to communicate with SIM card, 3 signals SIM_DATA,
SIM_CLK, SIM_RST(GPIO_23) are required.
The descriptions about the signals are given by bellow Table 3-7 in detail.
17
Signals Description
PA_EN (GPO16) PAM Enable/Disable
S_EN (GPO19) PLL Enable/Disable
S_DATA (GPO20) Serial Data to PLL
S_CLK (GPO21) Clock to PLL
Signals Description
SIM_DATA This pin receives and sends data to SIM card.
This model can support only3.0 volt interface SIM card.
SIM_CLK Clock 3.25MHz frequency.
SIM_RST Reset SIM block(GPIO_23)
Table 3-6. RF Control Signals Description
Table 3-7: SIM Control Signals Description