Controlling the projector by using RS-232C

You can also control the projector by entering the command from a computer via RS-232C.

CONTENTS

73

Signal assignment of RS-232C

 

 

Interface format

1 2

 

 

 

 

1

Communication

 

Pin No.

Signal

Description

 

 

method

4

 

 

 

 

 

 

1

RXD

Receiving data

 

3

5

2

CTS

Consent to send

2

Communication

3

DSR

Data set ready

 

 

 

format

6

8

4

GND

Signal ground

 

 

 

5

RTS

Request to send

3

Data format

7

 

6

N.C

No connection

CONTROL RS-232C

7

TXD

Sending data

 

 

8

N.C

No connection

4

Return value

 

 

 

 

 

 

 

RS-232C

9600 bps, No parity, Data length: 8 bits,

Stop bit: 1 bit

STX (02h) Command (3Byte) ETX (03h)

One command only can be used per communication.

Commands shall be composed of alphanumeric characters of ASCII description. Use only capital letters.

Acknowledge ACK (06h)

Not Acknowledge NAK (15h)

Command list

Classification

Items/Status

 

Selection

Adjustment

Analog RGB(1)

Digital RGB

Video

Y/PB/PR

Camera

 

 

 

Command

Command

Analog RGB(2)

 

S-Video

 

 

Power

On

 

PON

-

Yes

Yes

Yes

Yes

Yes

 

Off (with confirmation message)

POF

-

Yes

Yes

Yes

Yes

Yes

 

Shut Down (without confirmation message)

PSD

-

Yes

Yes

Yes

Yes

Yes

Normal (RS

-232C Condition Display Off)

DOF

-

Yes

Yes

Yes

Yes

Yes

Picture

Contrast

 

VCN

Yes

Yes

Yes

Yes

Yes

Yes

 

Brightness

 

VBR

Yes

Yes

Yes

Yes

Yes

Yes

 

Sharpness

 

VSH

Yes

-

-

Yes

Yes

Yes

 

Camera gain

Increase

CGU

-

-

-

-

-

Yes

 

 

Decrease

CGD

-

-

-

-

-

Yes

 

Picture mode

Bright

MVB

-

Yes

Yes

-

-

-

 

 

True color

MVP

-

Yes

Yes

-

-

-

Notes

When commands are transmitted serially, wait for the reply of the projector (acknowledge or not acknowledge) before sending the next command.

Adjustment commands include “ARG” (increase adjustment value) and “ALF” (decrease adjustment value). For usable items (marked "Yes"), send after the selection command.

The "Yes" marks in the input source columns indicate that that command can be used.

Others

Continued

Page 73
Image 73
Toshiba TLP381, TLP380 Controlling the projector by using RS-232C, Signal assignment of RS-232C Interface format

TLP381, TLP380 specifications

The Toshiba TLP380 and TLP381 are advanced optoisolators designed for various applications requiring reliable isolation and switching control. These devices are particularly valuable in communication, industrial, and consumer electronics, where signal integrity and noise immunity are crucial.

The TLP380 is a phototransistor optoisolator, featuring a gallium arsenide infrared LED and a phototransistor. With a minimum isolation voltage of 5,000 VRMS, it provides high voltage isolation between input and output, making it an excellent choice for protecting sensitive components from high voltages and surges. The TLP380 offers a high-speed switching capability, with a rise time of around 4 μs, enabling it to transmit signals efficiently in digital circuits.

On the other hand, the TLP381 is also a phototransistor optoisolator but specifically optimized for lower input current, making it more power-efficient. It offers similar isolation voltage ratings and switching characteristics to the TLP380, but with a lower input current threshold, which can be particularly advantageous in battery-powered applications. The lower current requirement helps extend battery life and minimizes power consumption in portable devices.

Both TLP380 and TLP381 devices feature a wide temperature range, making them suitable for various environmental conditions. Their operating temperature ranges from -40°C to +100°C, ensuring reliable performance under extreme conditions. Additionally, with their compact DIP packages, they are easy to integrate into crowded PCB layouts, making them a preferred choice for designers targeting space-constrained applications.

In terms of characteristics, both models provide low output voltage saturation and high-speed operation, which are critical in achieving fast response times in control circuits. The combination of robust isolation, efficient power consumption, and temperature stability makes the TLP380 and TLP381 versatile solutions for isolating signals in a myriad of electronic systems.

In summary, the Toshiba TLP380 and TLP381 optoisolators are engineered for high-performance signal isolation, offering superior technologies and characteristics that cater to a range of applications. Their reliability, efficiency, and compact design make them a compelling choice for engineers and designers looking to enhance their electronic systems.