LG KF690 Service Manual page 41

3. TECHNICAL BRIEF
B. the others
❏ TRK_LO_ADJ : TCXO(19.2M) Control
❏ ANT_SEL[0-2] : Ant Switch Module Mode Selection(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
3.9.2 ESM6270 Sub System
USIM Interface
SIM interface scheme is shown in [Fig. 3.14]
And, there control signals are followed
❏ USIM_CLK : USIM Clock
❏ USIM_Reset: USIM Reset
❏ USIM_Data : USIM Data T/Rx
ESM6270
UART signals are connected to ESM6270 GPIO through IO connector with 115200 bps speed.
GPIO_Map Name
GPIO_96 UART_RXD
GPIO_95 UART_TXD
LGE Internal Use Only
UART Interface
PM6635
[Fig. 3.14] SIM Interface
Note
Data_Rx
Data_Tx
[Table 3.5] UART Interface
- 42 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes