LG GCE 8160B Service Manual page 36

60 VPVSS
Internal Audio Interface
61 DACVSS
62 RO
63 DACVREF
64 LO
65 DACVDD
Reset Interface
52 URST
105 PRST_
Extended GPIO Interface
94 ~91 IO3~ IO0
Mega Interface
81 EJECT_
82 PLAY_
95 ICEMODE
96 TEST
97 LED
99 TRAYIN_
100 TRAYOUT_
101 LIMIT_
103 TROPEN
104 TRCLOSE
Motor and Actuator Driver Interface
106 FG
107 FMO2
108 FMO
109 ENDM
110 DMO
111 PWMVREF
112 PWM2VREF
113 PDMVSS
114 TRO
115 FOO
116 PDMVDD
Signal Amplifier Interface
117 DEFECT
118 SBAD
48
Ground
Ground
Analog Output
Analog Output
Analog Output
Analog Power(5V)
TTL Input, SMT reset input. The active high input is used to reset MT1505.
TTL Input, SMT
TTL I/O, Slew rate,
50K pull up, 4mA
TTLpull up input
TTL pull up input
TTL pull down input
TTL pull down input
TTL Output, 4mA
TTL pull up input Tray_is_in input, A logical low indicates the tray is in. Feedback
TTL pull up input Tray_is_out input. A logical low indicates the tray is out. Feedback
TTL pull up input
PWM/TTL output
PWM/TTL output
TTL Input, SMT
50K pull-up
Analog Output
Analog Output
TTL Output, 4mA Enable/disable disk motor. A logical high enables disk motor.
Analog Output
Analog Input A reference voltage input for PWM circuitry. A typical value of 2.0 v.
Analog Input A reference voltage input for PWM circuitry. A typical value of 4.0 v.
Ground
Analog Output Tracking servo output. PDM output of tracking servo compensator.
Analog Output Focus servo output. PDM output of focus servo compensator
Analog Power(5V)
Analog input
Analog Input
Ground pin for varipitch VCO circuitry.
Ground pin for internal DAC circuitry.
Right channel of audio.
Reference voltage for external audio filter circuit.
Left channel of audio.
Power pin for internal DAC circuitry.
Power on reset input, active low.
Programmable GPIO.
Eject/stop key input, active low.
Play/pause key input, active low.
ICE mode, active high
Test mode, active high
LED control output. Controlled by µP.
flag from tray connector.
flag from tray connector.
Sledge inner limit input, active low.
Tray open output. Controlled by µP.
Tray close output. Controlled by µP.
Motor Hall sensor input.
Feed motor 2 control. PWM output..
Feed motor control. PWM output.
Disk motor control output. PWM output.
Ground for PDM circuitry.
Power for PDM circuitry.
Hardware detect Defect from Disk
Sub beam add input(E+F)