Pioneer VSX-55TXi Service Manual page 161

5
Pin Function
No. Pin Name I/O
1 12VTRIGGER O
2 – O
3 1394 RST O
4 1394 CS O
5 1394 DO O
6 1394 DI I
7 1394 CK O
−
8 GND
−
9 CNVSS
10 – O
11 – O
−
12 XRESET
−
13 XOUT
−
14 GND
−
15 XIN
−
16 5V
17 NMI I
18 WAKEUP I
19 1394 INT I
20 1W WUP I
21 – O
22 DISP EN O
23 OSD RST O
24 OSD CS O
25 OSD CONT. O
26 DISP RST O
27 DISP RDY I
28 OSD/DISP CLK O
29 DISP DO I
30 OSD/DISP DI O
31 232C RXD O
32 232C TXD I
33 CLK O
34 232C CTS O
35 DSP DI O
36 DSP DO I
37 DSP CLK O
38 DSP1 RST O
39 DSP2 RST O
40 DSP1 SS O
41 DSP2 SS O
42 DSP MODE1 O
43 DSP MODE2 O
44 DIR DI O
45 DIR DO I
46 DIR CS O
47 DIR CK O
48 DIR ERR I
49 DIR RST O
50 DECO MUTE I
5
6
"H" at ON
NC "L" fixed.
Reset for 1394
Standby for 1394 (Not used) "L" fixed.
DO for 1394
DI for 1394
CK for 1394
Ground
5.1kΩ pulldown
L" fixed
L" fixed
Reset
Oscillator
Ground
Oscillator
5V power supply
Cannot use it as usual input port
Wakeup
INT for 1394
Wakeup signal at standby (from the display microcomputer)
L" fixed
Communication enabling signal to the display microcomputer
OSD-IC reset signal L: reset, H: release reset
OSD-IC chip select signal
At data transfer to the OSD-IC: "H"
Display microcomputer reset signal
Communication enabling signal from the display microcomputer
Communication clock signal with the OSD-IC/display microcomputer
Communication data in signal with the display microcomputer (N ch open drain)
Communication data out signal with the OSD-IC/display microcomputer (N ch open drain: pullup)
For 232C rewriting (data output)
For 232C rewriting (data input)
Not used
For 232C rewriting (communication permission)
Communication data out signal with the DSP1 microcomputer
Communication data in signal with the DSP2 microcomputer
Communication clock signal with the DSP microcomputer
DSP1 microcomputer reset signal
DSP2 microcomputer reset signal
Slave select signal to DSP1 microcomputer
Slave select signal to DSP2 microcomputer
Mode selection of DSP1 microcomputer (ROM/RAM) H: ROM mode, L: RAM (PPP) mode
Mode selection of DSP2 microcomputer (ROM/RAM) H: ROM mode, L: RAM (PPP) mode
Communication data out signal with the DIR
Communication data in signal with the DIR/DAC
Communication chip select signal with the DIR/DAC
Communication clock signal with the DIR/DAC
Lock/Unlock signal
DIR reset signal
Boot success detecting port of 1st DSP
6
7
Pin Function
(100kΩ pullup)
(pulldown)
L: reset, H: release reset (pulldown)
L: reset, H: release reset
L: reset, H: release reset
VSX-55TXi
7
8
Active
A
B
H
H
H
C
H
H
D
L
L
H
H
E
F
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