52
Pin No.
Pin Name
I/O
Description
42, 43
BUS
O
Not used (open)
44
BUS XRD
O
Bus read signal output to the MPEG video/audio decoder (IC506)
45
BUS
I
Vertical synchronized signal input Not used (open)
46
BUS XWR
O
Bus write signal output to the MPEG video/audio decoder (IC506)
47
8830-CS
O
Chip select signal output to the MPEG video/audio decoder (IC506)
48
AUDIO MUTE
O
Audio muting on/off control signal output terminal “L”: muting on Not used (open)
49
LOAD OUT
O
Loading motor drive signal output terminal Not used (open)
50
LOAD IN
O
Loading motor drive signal output terminal Not used (open)
51
INSW
I
Disc detection (load in) switch input terminal Not used (open)
52
OUTSW
I
Disc detection (load out) switch input terminal Not used (open)
53
MODEL1
I
Destination setting terminal (pull up)
54
MODEL2
I
Destination setting terminal (pull down)
55 to 61
A15 to A9
O
Address signal output to the external device Not used (open)
62
VCC
—
Power supply terminal (+5V)
63
A8
O
Address signal output for the external device Not used (open)
64
VSS
—
Ground terminal
65 to 69
A7 to A3
O
Address signal output for the external device Not used (open)
70 to 72
A2 to A0
O
Address signal output to the D-RAM (IC507) and program ROM (IC508)
73
TEST LED
O
LED drive signal output for the self diagnosis indicator (D502) Normally: “L” (LED on)
74
TEST1
I
Setting terminal for the test mode 1 (for VCD check)
Normally: fixed at “H” (“L”: test mode)
75
TEST2
I
Setting terminal for the test mode 2 (for SERVO check)
Normally: fixed at “H” (“L”: test mode)
76
TEST3
I
Setting terminal for the test mode 3 Normally: fixed at “H” (“L”: test mode)
Not used (fixed at “H”)
77
DEVICE RESET
O
System reset signal output to the CXD3008Q (IC101), BA5982FM (IC102), D/A converter
(IC509) and BU2990 (IC511) “L”: reset
78
STANDBY
O
Standby on/off control signal output terminal Not used (open)
79
FL CS
O
Chip select signal output terminal Not used (open)
80
FLBLK
O
Blank control signal output terminal Not used (open)
81 to 88
D7 to D0
I/O
Two-way data bus with the MPEG video/audio decoder (IC506) and D-RAM (IC507)
Data input to the program ROM (IC508)
89
NC
O
Not used (open)
90 to 92
KEY1 to KEY3
I
Key input terminal Not used (fixed at “H”)
93
NT/PAL
I
Video system select switch (S501) input terminal
“L”: PAL, “H”: NTSC, Center voltage: AUTO
94, 95
NC
O
Not used (open)
96
AVSS
—
Ground terminal (for A/D conversion)
97
NC
O
Not used (open)
98
VREF
I
Reference voltage (+5V) input terminal (for A/D conversion)
99
AVCC
—
Power supply terminal (+5V) (for A/D conversion)
100
NC
O
Not used (open)
Содержание HTC-NX300
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