Pioneer VSX-45TX Service Manual page 134

1
Pin Function
No. Pin Name
A 1 12VTRIGGER
2 –
3 1394 RST
4 1394 CS
5 1394 DI
6 1394 DO
7 1394 CK
8 GND
9 CNVSS
10 –
11 –
B
12 XRESET
13 XOUT
14 GND
15 XIN
16 5V
17 NMI
18 WAKEUP
19 1394 INT
20 1W WUP
21 –
22 DISP EN
C
23 OSD RST
24 OSD CS
25 OSD CONT.
26 DISP RST
27 DISP RDY
28 OSD/DISP CLK
29 DISP DO
30 OSD/DISP DI
31 232C RXD
32 232C TXD
33 CLK
D
34 232C CTS
35 DSP DI
36 DSP DO
37 DSP CLK
38 DSP1 RST
39 DSP2 RST
40 DSP1 SS
41 DSP2 SS
42 DSP MODE1
43 DSP MODE2
E 44 DIR DI
45 DIR DO
46 DIR CS
47 DIR CK
48 DIR ERR
49 DIR RST
50 DECO MUTE
F
134
1
2
I/O
O "H" at O
O NC "L" fixed.
O Standby for 1394 (Not used)
O Standby for 1394 (Not used)
O Standby for 1394 (Not used)
I Standby for 1394 (Not used)
O Standby for 1394 (Not used)
−
Ground
−
5.1kΩ pulldown
O L" fixed
O L" fixed
−
Reset
−
Oscillator
−
Ground
−
Oscillator
−
5V power supply
I Cannot use it as usual input port
I Wakeup
I Standby for 1394 (Not used)
I Wakeup signal at standby (from the display microcomputer)
O L" fixed
O Communication enabling signal to the display microcomputer
O OSD-IC reset signal L: reset, H: release reset
O OSD-IC chip select signal
O At data transfer to the OSD-IC: "H"
O Display microcomputer reset signal
I Communication enabling signal from the display microcomputer
O Communication clock signal with the OSD-IC/display microcomputer
I Communication data in signal with the display microcomputer (N ch open drain)
O Communication data out signal with the OSD-IC/display microcomputer (N ch open drain: pullup)
O For 232C rewriting (data output)
I For 232C rewriting (data input)
O Not used
O For 232C rewriting (communication enabling)
O Communication data out signal with the DSP1 microcomputer
I Communication data in signal with the DSP2 microcomputer
O Communication clock signal with the DSP microcomputer
O DSP1 microcomputer reset signal
O DSP2 microcomputer reset signal
O Slave select signal to DSP1 microcomputer
O Slave select signal to DSP2 microcomputer
O Mode selection of DSP1 microcomputer (ROM/RAM) H: ROM mode, L: RAM (PPP) mode
O Mode selection of DSP2 microcomputer (ROM/RAM) H: ROM mode, L: RAM (PPP) mode
O Communication data out signal with the DIR
I Communication data in signal with the DIR/DAC
O Communication chip select signal with the DIR/DAC
O Communication clock signal with the DIR/DAC
I Lock/Unlock signal
O DIR reset signal
I Boot success detecting port of 1st DSP
2
3
Pin Function
"L" fixed.
"L" fixed.
"L" fixed.
Standby with the circuit.
"L" fixed.
(100kΩ pullup)
Standby with the circuit.
L: reset, H: release reset (pulldown)
L: reset, H: release reset
L: reset, H: release reset
VSX-45TX
3
4
(pulldown)
4
Active
H
H
H
H
H
L
L
H
H