LG G5500 Manual page 22

3.3.5. SIM Interface
SIM interface scheme is shown in (Figure 8).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate DBB with ABB and the Charge Pump in
ABB enables 1.8V/3V SIM operation.
SIM Interface
SIM_CLK SIM card reference clock
SIM_RST SIM card async/sync reset
SIM_IO SIM card bidirectional data line
SIM_PWCTRL SIM card power activation
SIM_CD SIM card presence detection
DBB DBB
SIM_IO SIM_IO
SIM_CLK SIM_CLK
SIM_RST SIM_RST
SIM_PWRCTRL SIM_PWRCTRL
SIM_CD SIM_CD
3.3.6. UART Interface
G5500/7050 has two UART Drivers as follow :
UART1 : Hardware Flow Control / Fax & Data Modem
UART2 : Handsfree Control / SW trace or IrDA Modem
Figure 8. SIM Interface
V_IO V_IO
DBBSIO DBBSIO
DBBSCK DBBSCK
DBBSRST DBBSRST
10k 10k
-23-
ABB ABB V_SIM V_SIM
VRSIM VRSIM
10k 10k
SIMCLK SIMCLK
SIMIO SIMIO
SIMRST SIMRST
150p 150p 22p 22p
SIM SIM
VPP VPP
CLK CLK
IO IO
RST RST
1u 1u