Read Sharp DV-NC55 (serv.man11) Service Manual online
76
DV-NC55S/H
DV-NC60H
DV-NC60H
Serial
Data
Interface
Control
Segment
Driver/
Grid
Driver/
Key Scan
Output
Grid
Driver
Dimming Circuit
Timing Generator
Key Matrix Memory
Display Memory
(16bits x 11 Words)
OSC
General
Input
Register
LED
Driver
10 11 12 13
14, 38 7, 43
27
VDD
GND
VEE
K1 K2 K3 K4
SW1
SW2
SW3
SW4
LED1
LED2
LED3
LED4
1
6
5
8
9
42
41
40
39
2
3
4
OSC
VDD
R
DIN
DOUT
CLK
STB
44
15
16
17
18
19
20
21
22
23
24
25
26
28
29
30
31
37
36
35
36
35
34
33
32
32
GR1
GR2
GR3
GR4
GR5
GR6
SG12/GR11
SG13/GR10
SG14/GR9
SG15/GR8
SG16/GR7
SG1/KS1
SG2/KS2
SG3/KS3
SG4/KS4
SG5/KS5
SG6/KS6
SG7
SG8
SG9
SG10
SG11
Pin No.
Terminal name
I/O
Operation function
1-4
SW1 to SW4
I
General purpose input pins
5
DOUT
O
Data output pin (N-Channel, Open-Drain)
This pin outputs serial data at the falling edge of the shift clock (starting from the lower bit).
This pin outputs serial data at the falling edge of the shift clock (starting from the lower bit).
6
DIN
I
Data input pin
This pin inputs serial data at the rising edge of the shift clock (starting from the lower bit)
This pin inputs serial data at the rising edge of the shift clock (starting from the lower bit)
7, 43
GND
–
Ground pin
8
CLK
I
Clock input pin
This pin reads serial data at the rising edge and outputs data at the falling edge.
This pin reads serial data at the rising edge and outputs data at the falling edge.
9
STB
I
Serial interface strobe pin
The data input after the STB has fallen is processed as a command.
When this pin is "HIGH", CLK is ignored.
The data input after the STB has fallen is processed as a command.
When this pin is "HIGH", CLK is ignored.
10-13
K1 to K4
I
Key data input pins
The data inputted to these pins are latched at the end of the display cycle.
The data inputted to these pins are latched at the end of the display cycle.
14, 38
VDD
–
Logic power supply
15-20
SG1/KS1 to
O
High-voltage segment output pins also acts as the key source
SG6/KS6
21-25
SG7 to SG11
O
High voltage segment output pin
26, 28-31
SG12/GR11
High voltage segment/grid output pins
SG13/GR10 to
O
SG16/GR7
27
VEE
–
Pull-down level
32-37
GR6 to GR1
O
High-voltage grid output pins
42-39
LED1 to LED4
O
LED output pin
44
OSC
I
Osillator input pin
A resistor is connected to this pin to determine the oscillation frequency.
A resistor is connected to this pin to determine the oscillation frequency.
12-10. IC5001 PT6312LQ FL DRIVER
• Block Diagram
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