PT6321 Просмотр технического описания (PDF) - Princeton Technology

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Компоненты Описание

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PT6321

Fluorescent Display Tube Controller Driver

Princeton Technology 

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. IOH>–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. IOH>–5.0mA

VDISP1~2

Power supply VDISP-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. IOH>–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

VDD

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. IOH>–2.0mA

67

68

69

70

71

72-75

V1.0

5

August, 2009

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