LG HB620 Service Manual

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Only for training and service purposes
B. the others
❏ TRK_LO_ADJ : TCXO(19.2M) Control
❏ PA_ON : WCDMA(2100) TX Power Amp Enable
❏ ANT_SEL[0-2] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx, DCS-PCS Tx/Rx)
❏ GSM_PA_BAND : GSM/DCS-PCS Band Selection of Power Amp
❏ GSM_PA_RAMP : Power Amp Gain Control of APC_IC
❏ GSM_PA_EN : Power Amp Gain Control Enable of APC_IC
3.10.2 MSM Sub System
SIM Interface
SIM interface scheme is shown in [Fig. 3.19].
And, there control signals are followed
❏ USIM_CLK : USIM Clock
❏ USIM_Reset : USIM Reset
❏ USIM_Data : USIM Data T/Rx
UART Interface
UART signals are connected to MSM GPIO through IO connector with 115200 bps speed.
3. TECHNICAL BRIEF
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[Fig. 3.14] SIM Interface
GPIO_Map Name Note
GPIO_96 UART_RXD Data_Rx
GPIO_95 UART_TXD Data_Tx
[Table 3.8] UART Interface
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LG HB620 Specifications

General

Brand	LG
Model	HB620
Category	Cell Phone
Language	English