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IC BLOCK DIAGRAM & DESCRIPTION
IC601 PST6315(VFD Driver)
7
DIN
Serial
6
DOUT
Data
CLK
8
Interface
STB
9
OSC
5
OSC
LED1
1
LED
LED2
2
Driver
3
LED3
LED4
4
Pin Name
LED1 to LED4
(Schmitt Trigger)
(Schmitt Trigger)
(Schmitt Trigger)
K1 to K2
SG1/KS1 to SG16/KS16
SG17/GR12 to SG24/GR5
GR4 to GR1
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Control
Display Memory
(24 bits x 17 Words)
TI~inc Generator
Key Moter Memory
10
11
K1
K2
I/O
O
OSC
I
A resistor is connected to this pin to
determinc the oscillation frequency
Data Output Pin (N-Channel, Open-Drain)
DOUT
O
This pin outputs scrial data at the falling
cdge of the shift clock (starting from the lower bit)
DIN
I
This pin inputs serial data at the rising cdge
of the shift clock (starting from the lower bit)
CLK
I
This pin reads serial data at the rising cdge
and outputs data at the falling cdge.
STB
The data input after the STB has fallen is
I
When this pin "HIGH",CLK is ignored,
I
The data inputted to these pins are fatched
VSS
-
VDD
-
High-Voltage Segment Output Pins
O
VEE
-
O
High Voltage Segment/Grid Output Pins
O
Segment
Driver
Grid
Driver
Key Scan
Output
Driver
Driving Circuit
13
30
VDD
GND
VEE
Description
LED Output Pin
Oscillator Input Pin
Data Input Pin
Clock Input Pin
Serial Interface Strobe Pin
processed as a command.
Key Data Input Pins
at the end of the display cycle.
Logic Ground Pin
Logic Power Supply
Also acts as the Key Source
Pull-Down Level
High-Voltage Grid Output Pins
- 43 -
14
SG1/KS1
15
SG2/KS2
16
SG3/KS3
17
SG4/KS4
18
SG5/KS5
19
SG6/KS6
20
SG7/KS7
21
SG8/KS8
22
SG9/KS9
23
SG10/KS10
24
SG11/KS11
25
SG12/KS12
26
SG13/KS13
27
SG14/KS14
28
SG15/KS15
30
SG16/KS16
31
SG17/GR12
32
SG18/GR11
33
SG19/GR10
34
SG20/GR9
35
SG21/GR8
36
SG22/GR7
37
SG23/GR6
38
SG24/GR5
42
GR1
41
GR2
Grid
40
GR3
39
GR4
Pin No.
1 to 4
5
6
7
8
9
10, 11
12, 44
13, 43
14 to 29
30
31 to 38
39 to 42
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