Pioneer VSX 108 - AV Receiver Manual de serviço - Página 32

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Pioneer VSX 108 - AV Receiver Manual de serviço
VSX-108
00202879-040 (BU2879AK) (DISPLAY PCB : IC702)
• FL Driver IC for VTR
Block Diagram
SW1 - SW4
K1 - K4
Pin Function
No.
Name
I/O
1
SW1
2
SW2
General-purpose input
I
3
SW3
Input data is able to transfer to the
microcomputer with serial
4
SW4
Serial data output from upper bit
5
SO
O
Output is N ch open-drain
6
SI
I
Serial data input from upper bit
7
VSS
Connect to system GND
8
SCK
I
Serial clock input at rising edge
9
CS
I
Serial chip select L: serial initialize, H: effective
10 K1
11 K2
I
Key scan data input
12 K3
13 K4
14 VDD
I
Power supply pin 1 Connect to system power
15 S1
16 S2
17 S3
O Output for segment
18 S4
Output is P ch open-drain and pull-down resistor
19 S5
20 S6
21 S7
22 S8
32
CS
SCK
SI
9
8
6
8 bit Shift-Reg.
4
4 bit
Data
KEY Data
4
Latch
(4
6)
SEGMENT Driver
11
15 - 25
S1 -S11
Function
SO
V
SS
5
7
16 bit Latch
16 bit
15 word
Display Data RAM
S/G Driver
5
26, 28 - 31
S12/G15 - S16/G11
No.
Name
I/O
23 S9
Output for segment
24 S10
O
Output is P ch open-drain and pull-down resistor
25 S11
Output for segment and grid
26 S12/G15
O
open-drain and pull-down resistor
Power supply pin 2
27 VEE
I
Connect a pull-down resistor of FLD driver ouput
28 S13/G14
29 S14/G13
Output for segment and grid
O
Output is P ch open-drain and pull-down resistor
30 S15/G12
31 S16/G11
32 G10
33 G9
34 G8
Output for grid
O
35 G7
Output is P ch open-drain and pull-down resistor
36 G6
37 G5
38 VDD
I
Power supply pin 1 Connect to system power
39 G4
40 G3
O Output for grid
41 G2
Output is P ch open-drain and pull-down resistor
42 G1
43 VSS
I
Connect to system GND
44 OSC
I/O Connect a capacitor for oscillation
OSC
V
DD
44
38
OSC
Control
Logic
Grid
G10 - G1
Driver
10
38
V
EE
Function
Output is P ch