Sim Interface; Only For Training And Service Purposes - LG KC780 Service Manual

RPWRON_EN
RPWRON
END_KEY_IN
Figure 10 Remote power on and End-key power on circuit

3.6. SIM interface

KC780 supports 1.8V & 3V plug in SIM, SIM interface scheme is shown in (Figure 10).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-GOLDradio) and the SIM power
supply enabled by BBP (_SIM_EN).
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Remote Power On
3
R408
1
3.3M
2
R410
C405 3.3M
2.2u
- 39 -
VRTC_2V0
Q401
2SC5663
3
Q403
1
2SC5663
2
3. TECHNICAL BRIEF
PWRON
EN
LGE Internal Use Only