7
DPX501/501U/501UY
DPX-MP2090U
Pin No.
Pin Name
I/O
Application
Truth
Processing Operation Description
Value Table
34
ROMCOR SCL
I/O
E2PROM I2C clock output for
ROM correction
Panel 5V control
L: ON
35
PON PANEL
I/O
(Flip-down panel model only)
Hi-Z: Momentary power down, panel detached or 11
minutes after ACC OFF
36
DSI
I/O
DSI/EJECT LED control
OFF: Hi-z, Pulse drive: Panel detached
(Flip-down panel model only)
H: Illumination ON or panel opened (POWER ON)
37,38
NC
-
Not used
L fixed
39
EPM
I
Flash EPM input
40
PANEL DET
I
Panel detection (Flip-down panel model only)
L: Panel detached, H: Panel attached
41
NC
-
Not used
L fixed
42
ROMCOR DET
I
E2PROM writing request
H: Writing
43
PON FL
O
FL+B control
H: FL+B ON, L: FL+B OFF
44
VFD CS
O
VFD chip select control
45
ROTARY CW
I
VOL key input
Detects pulse width
46
ROTARY CCW
I
VOL key input
Detects pulse width
47
CD DISC12 SW
I
12cm CD detection
48
CD LOS SW
I
CD loading detection
49
CD MUTE R
I
Rch CD mute request
H: Normal, L: Requesting Rch mute
50
CD MUTE L
I
Lch CD mute request
H: Normal, L: Requesting Rch mute
51
CD MRST
O
CD mecha
µ
-COM reset
H: Normal, L: Reset
52
CD MSTOP
O
CD mechanism
µ
-COM stop
H: Mecha
µ
-COM operates, L: Mecha
µ
-COM stops
53
CD DISC8 SW
I
8cm CD detection (Not used)
54
CD LOE LIM SW
I
CD detection (Chucking SW)
H: Loading completes, L: No disc
55
CD LOEJ
I/O
CD motor control
w
Refer to the truth value table
56
CD MOTOR
O
CD motor control
w
Refer to the truth value table
57
PON ILLUMI
I/O
Key illumination power supply control
H: ON, Hi-Z: OFF
58
PON CD
O
Power supply control for CD-WMA
L: POWER ON, H: POWER OFF
L: Before M-STOP with reset
59
PON
O
Power supply
H: POWER ON, L: POWER OFF
60
VCC2
-
61
EXT AMP CON
I/O
EXTERNAL AMP control
62
VSS
-
63~65
TYPE 1~3
I
Destination switching
e
Refer to the truth value table
66
TUN TYPE1
I
Destination setting 1
r
Refer to the truth value table
67
TUN TYPE2
I
Destination setting 2
r
Refer to the truth value table
68
OEM DISP DATA
I/O
External display data
External display
(Destination K and E only)
MICROCOMPUTER’S TERMINAL DESCRIPTION