LG GS290 Service Manual page 24

3. TECHNICAL BRIEF
VBAT
C375
2.2u
C379
2.2u
L319
FM_ANT
100n
L318 C376
100n 27p
E1
FM_RX
E2
VSS_FM_AUDIO
F1
FM_TX_P
ANT302 ANT301 FL300 G1
FM_TX_N
LFB212G45SG8A166
R302
C382 15p B1
BT_RF
IN OUT
0
GND1 GND2
C302 C1 VSS_BT_RADIO_BAL
1.5p
VBT_2V65
C371 47n
GS290_C-CLIP
L313
R309
R304
C366 330p 270n
1
FEED
2
1 270n 100n
ANT303 D300 C384 2
VA308
22p EVLC18S02015
EDTY0008606 1
Figure 18. Bluetooth / FM Radio Circuit Diagram
LGE Internal Use Only - 48 -
VBT_2V65
C308 C378
C312
2.2u 0.1u
0.1u
C309 C377 C304
2.2u 470n 2.2u
D4
PCM2_IN
B5
PCM2_OUT
I2S2_SDO
B6
PCM2_SYNC
I2S2_WS
C5
PCM2_CLK
I2S2_CLK
F5
PCM1_IN_SPI_MOSI
BT_PCM_OUT
G6
PCM1_OUT_SPI_MISO BT_PCM_IN
G5
PCM1_SYNC_SPI_CS
BT_PCM_SYNC
F4
PCM1_CLK_SPI_CLK
BT_PCM_CLK
D6 TP308
UART_TX
BT_UART_RX
U301 D5
UART_RTS
BT_UART_CTS
UART_CTS E6
BT_UART_RTS
BC7820
C6 TP311
UART_RX
BT_UART_TX
C301 1u
AUDIO_OUT_L D3
FM_AUDIO_L
D2 C303 1u
AUDIO_OUT_R
FM_AUDIO_R
TP312
PIO_2_CLK_REQ_OUT E3
BT_CLK_REQ
100K
E4
SPI_PCM_SEL
R301
PIO_3_CLK_REQ_IN F3
C3
PIO_4
BT_HOST_WAKEUP
R305
100K
C305 100p
CLK26M
R343
470
CLK32K
C370
U305
47n
BGB707L7ESD
1 6
VCC C_A
2 5 TP313
BIAS_OUT ON_OFF FM_LNA_CTRL
C369 330p
3 4
RF_IN RF_OUT
FM_ANT
C368
R342
680
330p
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Bluetooth Radio
• Common TX/RX teminal simplifies external matching, eliminates external antenna switch
• No external trimming is required In production
• Bluetooth v2.1 + EDR Specification compliant
Bluetooth Transmitter
• +6 dBm RF Transmit power with level control from on-chip 6-bit DAC over a dynamic range > 30dB
• Class 1 and Class 2 support without the need for an external power amplifier or TX/RX switch.
Bluetooth Receiver
• Integrated channel filters
• Digital demodulator for improved sensitivity and co-channel rejection
• Real time digitized RSSI available on HCI interface
• Fast AGC for enhanced dynamic range
• Channel classification for AFH
Synthesiser
• Fully integrated synthesizer requires no external VCO varactor diode, resonator or loop filter
• Compatible with crystals between 7.5 and 40MHz(in multiples of 250KHz) or an external clock
Audio
• Single-ended stereo analogue output
• 16-bit 48 kHz digital audio bit stream output
Baseband and Software
• Internal 48Kbyte RAM, allows full speed data transfer, mixed voice and data, and full piconet operation,
including all medium rate packet types
• Logic for forward error correction, header error control, access code correlation. CRC, demodulation,
encryption bit stream generation, whitening and transmit pulse shaping. Supports all Bluetooth v 2.0 + EDR
features incl. ESCO and AFH
• Transcoders for A-law, u-law and linear voice from host and A-law, u-law and CVSD voice over air
Physical Interfaces
• Synchronous serial interface up to 4Mbits/s for system debugging
• UART interface with programmable baud rate up to 4Mbits/s with an optional bypass mode
• USB v1.1 interface
• I2C slave for FM
• Two audio PCM interfaces (input and output)
• Analogue stereo (output only)
Copyright © 2010 LG Electronics. Inc. All right reserved. - 49 -
Only for training and service purposes
3. TECHNICAL BRIEF
LGE Internal Use Only