PT6321_10 Datasheet, PDF (5/6 Pages) Princeton Technology Corp – Fluorescent Display Tube Controller Driver

PT6321
PIN DESCRIPTION
Pin Name I/O Connects to
Description
AD1~4
O
Fluorescent tube
anode electrode
Fluorescent display tube anode electrode drives output.
Directly connected to fluorescent display tube. No pull-down
resistor is required. I_OH>–10.0mA
SEG1~35
O
Fluorescent tube
anode electrode
Fluorescent display tube anode electrode drives output. Directly
connected to fluorescent display tube. No pull-down resistor is
required. I_OH>–5.0mA
V_DISP1~2
Power supply V_DISP-PGND are power supplies for driving fluorescent tubes
COM1~24
O
Fluorescent tube
grid electrode
Fluorescent display tube grid electrode drives output.
Directly connected to fluorescent display tube. No pull-down
resistor is required. I_OH>–20.0mA
PGND1~2
Power supply High Voltage GND pin
LGND
Power supply Logic GND pin
Connect R and C externally. The RC time constant depends on
OSC0
I
the VDD voltage used. Set the target oscillation frequency to 2
MHz.
OSC1
O
C₁, R₁
(RC oscillation circuit) See
Application Circuit)
Pin No
1,2,79,80
3-37
38,78
39-62
63,76
64
65
66
/RESET
/CS
/CP
DA
V_DD
P1~4
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
I
Microcontroller _{• Contrast adjustment….. 8/16}
or C₂, R₂
• All lights ON or OFF….OFF mode
• All outputs….. "Low" level
(Circuit when R and C are
connected externally) See
application Circuit
I
Microcontroller
Chip select input
Setting this pin to "H" disables serial data transfer.
I
Microcontroller
Shift clock input.
Serial data is shifted on the rising edge of /CP.
I
Microcontroller
Serial data input (positive logic).
Input from LSB.
Power supply Logic Voltage Pin
O
LED drive control
terminals
General port output.
Output of these pins in static operation, so these pins can drive the
LED. I_OH>–2.0mA
67
68
69
70
71
72-75
V1.0
5
August, 2009