LG F1200 Service Manual page 25

3. TECHNICAL BRIEF
A. MIDI and MP3/AAC Decoder (NEC, uPD993)
NEC uPD9993 (U506) is the PCM sound generator and the MP3/AAC decoder LSI that
includes an on-chip real-time wide surround function for mobile phones. The uPD9993
includes a 8-bit parallel host interface, a 3/4 serial peripheral interface (SPI), control ports for
LED, Vibrator, and 4-general purpose I/Os. In F1200, uPD9993 is driven with 13MHz master
clock from DBB (Calypso plus). Stereo Audio signals are transferred to next stage from stereo
lineout ports of uPD9993. uPD9993 has internal analog volume stage. So volume control can
be operated in uPD9993.
MIDI_CS
MIDI_INT
VIBRATOR
1.5V_CORE
B6
PS
J6
TP522
CS_B_SCS
H4
A(2) A2
J5
A(1) A1_RXD
R569
K6
AD A0_DATA_TXD
K7
_WR 0 WR_B_SCLK
J7
_RD RD_B_SPIMODE
D(0:7)
K8
D0_SERINIT
J8
D1
H10
D2
H9
D3
G10
D4
G9
D5
F10
D6
F9
D7
TP521 E10
INT_SG_B
F8
INT_DSP_B
B8
BCLK
A8
LRCLK
A7
ASI
B7
ASO
A5
TRSCK
B5
CLK8K
A4
RDATA
D9
VIB
C10
LED
K3
PO0
J3
PO1
K4
PO2
J4
PO3
Figure 12. Audio Circuit Diagram
2.8V_DSP 2.8V_DSP
C548 C545 C544
0.1u 0.1u 0.1u
C547
1000p
E9
RESET_B
C546
H2
CLKIN
C543
C1
LINEOUT_L
C542
F1
LINEOUT_R
E2
VREF
D2
IREF
U506 R536
A1
UPD9993 SHORT_K1 56K
K1
SHORT_A1
A10
SHORT_K10
K10
SHORT_A10
B1
NC8
J1
NC9
A2
NC10
B2
NC11
J2
NC12
K2
NC13
C3
NC14
D3
NC15
E3
NC16
F3
NC17
G3
NC18
C2
TM0
F2
TM1
B3
TM2
A3
TM3
B4
TM4
- 24 -
DSP_RESET
1000p
MCLK
4.7u
4.7u
R520 R534
C541
47K 47K
220n