LG GX500 Service Manual page 32

GX500 Operational Description
3.2.2.3 RF Interface
3.2.2.3 RF Interface
S-GOLDradio uses this interface to control RF IC and Peripherals. 6 signals are provided switch on/off RF ICs
Periodically each TDMA frame.
Table 3-7 RF Interface Spec.
T_OUT
Resource Interconnection
PABS S2_PA_BAND
T_OUT6 PA_MODE_2
FE1 VC1
FE2 VC2
PAEN PA_EN
VRAMP TX_RAMP
3.2.2.4 USART Interface
GX500(SGold Radio Part) has a UART Driver as follow :
- USART1 : Hardware Flow Control / SW upgrade / Calibration
Table 3-8 USART Interface Spec.
USART_0(USART1)
Resource Name
USART0_TXD SIM2_UART_TX
USART0_RXD SIM2_UART_RX
3.2.2.5 ADC channel
SGold Radio ADC block is composed of 7 external ADC channel. This block operates charging process and
other related process by reading battery voltage and other analog values.
Table 3-9 S-GOLDradio ADC channel usage
ADC channel
Resource Interconnection
M0 BAT_ID
M1 RF_TEMP
M8 VSUPPLY
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Only for training and service purposes
Description
TX RF band select
PAM Mode select
FEM control
FEM control
PAM Power on
APC
Remark
Transmit Data
Receive Data
Description
Battery IC check
RF block temperature measure
Battery supply voltage measure
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3. TECHNICAL BRIEF
Revision A
LGE Internal Use Only