LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
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3.3.4 SIM interface
SIM interface scheme is shown in below.
SIM_IO, SIM_CLK, SIM_RST, SIM_PWRCTRL ports are used to communicate DBB via ABB with
plugged sim card and the LDO (VRSIM) in ABB enables operate 1.8V to 2.5V to search SIM card
SIM_CLK:
SIM Card reference clock
SIM_PWCTRL:
SIM Card power activation
SIM_RST:
SIM Card async/sync reset
SIM_IO:
SIM Card bi-directional data line
VRUSIM(Power supply VCC):
3 V 10% (class B) or 1.8 V 10% (class C)
Misc_ext_irq:
USIM card presence detection (USIM_CD) purposes.
<Fig.9> SIM Interface
Содержание KM710
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