Sony HCD-GTX88 Service Manual page 70

HCD-GTX88
• IC PIN DESCRIPTIONS
IC101 TC94A70FG-008 (S, D) (RF AMP, FOCUS/TRACKING ERROR AMP, DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO
PROCESSOR, DIGITAL FILTER, D/A CONVERTER) (BD91 BOARD)
Pin No. Pin Name
1 AVSS3
2 RFZi
3 RFRP
4 SBAD/RFDC
5 FEi
6 TEi
7 TEZi
8 AVDD3
9 FOo
10 TRo
11 VREF
12 FMO
13 DMO
14 VSSP3
15 VCOi
16 VDDP3
17 VDD1
18 VSS1
19 FGiN
20 IO0 (/HSO)
21 IO1 (/UHSO)
22 XVSS3
23 XI
24 XO
25 XVDD3
26 DVSS3
27 RO
28 DVDD3
29 DVR
30 LO
31 DVSS3
32 VDDT3
33 VSS1
34 VDD1
35 VDDM1
36 SRAMSTB
37 RST
38, 39 BUS0, BUS1
40 BUS2 (SO)
41 BUS3 (SI)
42 BUCK (CLK)
43 CCE
44 TEST
45 IRQ
46 AoUT3 (PO4)
47 AoUT2 (PO5)
48 PIO0
49 PIO1
50 PIO2
70
I/O
— Ground pin
I RF ripple zero crossing signal input
O RF ripple signal output
Sub beam addition signal or RF peak detection signal output
O
Not used in this set. (Open)
O Focus error signal output Not used in this set. (Open)
O Tracking error signal output
I Tracking error zero crossing signal input
— Power supply pin (+3.3 V)
O Focus coil drive signal output
O Tracking coil drive signal output
I Reference voltage (+1.65 V) input
O Sled motor drive signal output
O Spindle motor drive signal output
— Ground pin
I VCO control voltage input
— Power supply pin (+3.3 V)
— Power supply pin (+1.5 V)
— Ground pin
I FG signal input Not used. (Connected to ground.)
I Disc inner position detection signal input
O Not used in this set. (Open)
— Ground pin
I System clock input (16.9344 MHz)
O System clock output (16.9344 MHz)
— Power supply pin (+3.3 V)
— Ground pin
O Analog audio (R-ch) signal output
— Power supply pin (+3.3 V)
O Reference voltage (+1.65 V) output
O Analog audio (L-ch) signal output
— Ground pin
— Power supply pin (+3.3 V)
— Ground pin
— Power supply pin (+1.5 V)
— Power supply pin (+1.5 V)
I S-RAM standby mode control signal input Fixed at "L" in this set.
I Reset signal input from the system controller "L": reset
I/O Serial data input/output from the system controller or USB controller
I/O Serial data input/output from the system controller or USB controller
I/O Serial data input/output from the system controller or USB controller
I Serial data transfer clock signal input from the system controller or USB controller
I Chip enable signal input from the system controller or USB controller
I Setting pin for test mode Normally fixed at "L"
I Interrupt request signal input
O Request signal output to the USB controller Not used in this set. (Open)
O Audio data output to the USB controller
O Request signal output to the system controller or USB controller
O ST REQ signal output
O Not used in this set. (Open)
Pin Description