PT6321-LQ PTC [Princeton Technology Corp], PT6321-LQ Datasheet - Page 5

• Manufacturer Part Number: PT6321-LQ
• Description: Fluorescent Display Tube Controller Driver
• Manufacturer: PTC [Princeton Technology Corp]

PIN DESCRIPTION
V1.0
COM1~24
PGND1~2
Pin Name
SEG1~35
/RESET
V
AD1~4
LGND
OSC0
OSC1
P1~4
DISP1~2
/CS
/CP
V
DA
DD
I/O
O
O
O
O
O
I
I
I
I
I
LED drive control
Fluorescent tube
Fluorescent tube
Fluorescent tube
anode electrode
anode electrode
Microcontroller
Microcontroller
Microcontroller
Microcontroller
grid electrode
Power supply
Power supply
Power supply
Power supply
Connects to
terminals
or C
C
1
, R
2
, R
1
2
Fluorescent display tube anode electrode drives output.
Directly connected to fluorescent display tube. No pull-down
resistor is required. I
Fluorescent display tube anode electrode drives output. Directly
connected to fluorescent display tube. No pull-down resistor is
required. I
V
Fluorescent display tube grid electrode drives output.
Directly connected to fluorescent display tube. No pull-down
resistor is required. I
High Voltage GND pin
Logic GND pin
Connect R and C externally. The RC time constant depends on
the VDD voltage used. Set the target oscillation frequency to 2
MHz.
Reset input.
Setting this pin to "Low" initializes all the functions.
The initial status is as follows.
• Address of each RAM….. address "00"H
• Data of each RAM….. Content is undefined
• Number of display digits….. 24 digits
• Contrast adjustment….. 8/16
• All lights ON or OFF….OFF mode
• All outputs….. "Low" level
Chip select input
Setting this pin to "H" disables serial data transfer.
Shift clock input.
Serial data is shifted on the rising edge of /CP.
Serial data input (positive logic).
Input from LSB.
Logic Voltage Pin
General port output.
Output of these pins in static operation, so these pins can drive the
LED. I
DISP
-PGND are power supplies for driving fluorescent tubes
OH
>–2.0mA
OH
>–5.0mA
5
OH
OH
>–10.0mA
>–20.0mA
Description
(Circuit when R and C are
connected externally) See
application Circuit
(RC oscillation circuit) See
Application Circuit)
August, 2009
PT6321
1,2,79,80
Pin No
39-62
72-75
38,78
63,76
3-37
64
65
66
67
68
69
70
71