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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
3.3.3 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
<Fig.9> SIM Interface
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.
3.3.4 UART Interface
KM710d has Three UART Drivers as follow :
- UART1 : USB - UART2 : ETM, Calibration - UART3 : AT command, Fax_modem, Bluetooth
Resource Name Description
USB_DP DP Data
USB_DM DM Data
USB_PWR POWER USB_POWER
VBUS VBUS USB_Detect
DEBUG_RX RX Receive Data(UART2)
DE BUG_TX TX Transmit Data(UART2)
UART3_RXD UART3_RXD Receive Data
UART3_TXD UART3_TXD Transmit Data
UART3_RTS UART3_RTS Request To Send
UART3_CTS UART3_CTS Clear To Send
UART1(USB)
UART2 (ETM)
UART3 (Bluetooth)
<Table.2> UART Interface Spec
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