Service manual

GX30
6 – 7
CONFIDENTIAL
IC105 VHIYMU762C+-1L (YMU762C): SOUND
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Pin No. Terminal name Input/Output Description of terminal
1 CLKI Input Clock input terminal
2 LED Output External LED control terminal
3 /IRQ Output Interrupt output terminal
4 /RST Input Hardware reset input terminal
5* NC – Not used
6 PLLC – Built-in PLL capacitor terminal
7 VDD – Power supply (Typ + 3.0 V)
8 VSS – Ground
9 VREF – Analog reference voltage terminal
10 HPOUT-L/MONO Output Headphone output L-ch
11 HPOUT-R Output Headphone output R-ch
12 EQ1 – Equalizer terminal 1
13 EQ2 – Equalizer terminal 2
14 EQ3 – Equalizer terminal 3
15 SPVDD – Analog power supply for speaker amplifier (Typ + 3.6 V)
16 SPVSS – Analog ground for speaker amplifier
17 SPOUT1 Output Speaker terminal 1
18 SPOUT2 Output Speaker terminal 2
19 MTR Output External motor control terminal
20 D7 Input/Output CPU I/F data bus 7
21 D6 Input/Output CPU I/F data bus 6
22 D5 Input/Output CPU I/F data bus 5
23 D4 Input/Output CPU I/F data bus 4
24 D3 Input/Output CPU I/F data bus 3
25 D2 Input/Output CPU I/F data bus 2
26 D1 Input/Output CPU I/F data bus 1
27 D0 Input/Output CPU I/F data bus 0
28 /WR Input CPU I/F write enable
29 /CS Input CPU I/F chip select input
30 A0 Input CPU I/F address signal
31 /RD Input CPU I/F read enable
32 IOVDD – Power supply for terminal
PLL
Timing Generator
FiFO
64 byte
FM +
Wave Table
Synthesizer
PCM/ADPCM
Play back
TIMER
Soft IRQ
LED control
Vibrator control
D0~D7
/RD
/WR
A0
/CS
/RST/RST
16-bit
DAC
R-ch
L-ch
VREF
EQ
Vol
Select
Mono
HP
Vol R
R-ch
L-ch
HPOUT-R
CLKI
Control register SRAM/ROM
PLLC VSS VDD
EQ1
EQ2
EQ3
SPOUT1
SPOUT2
Analog power supply
for speaker amplifier
SPVDD
SPVSS
HPOUT-L/ MONO
11
HP
Vol L
VREF
VREF
1
Vol
Vol
SP
Vol
16 159
12
13
14
17
18
10
6
IOVDD
32
87
4
29
30
28
31
20~27
NC
5
/IRQ
3
LED
2
MTR
19
+-
Sequencer
Buffer
FiFO
512 byte
Intermediate register
Interface register
CPU interface