Matrix-orbital LK204-7T-1U Instrukcja Użytkownika Strona 40
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9 Definitions
ASCII: American standard code for information interchange used to give standardized numeric codes
to alphanumeric characters.
BPS: Bits per second, a measure of transmission speed.
DOW: Dallas One-Wire protocol, similar to I
2
C, provides reduced data rates at a greater distance. One
wire carries data, while two others supply power and ground. Matrix Orbital tests non-parasitic devices
only, those that do not draw power from the data line; however, some parasitic devices may work.
FFSTN: Double film super-twisted nematic in reference to an LCD. The addition of two layers of film
between the STN display and polarizer improves contrast.
GPO: General purpose output, used to control peripheral devices from a display.
GUI: Graphical user interface.
Hexadecimal: A base 16 number system utilizing symbols 0 through F to represent the values 0-15.
I
2
C: Inter-integrated circuit protocol uses clock and data lines to communicate short distances at
slow speeds from a master to up to 128 addressable slave devices. A display is a slave device.
LSB: Least significant bit or byte in a transmission, the rightmost when read.
MSB: Most significant bit or byte in a transmission, the leftmost when read.
RS232: Recommended standard 232, a common serial protocol. A low level is -30V, a high is +30V.
RS422: Recommended standard 422, a more robust differential pair serial protocol.
SDA: Serial data line used to transfer data in I
2
C protocol. This open drain line should be pulled high
through a resistor. Nominal values are between 1K and 10K Ω.
SCL: Serial clock line used to designate data bits in I
2
C protocol. This open drain line should be pulled
high through a resistor. Nominal values are between 1K and 10K Ω.
STN: Super-twisted nematic in reference to an LCD. In a relaxed or nematic state, crystals orientate
themselves in the same direction and allow light to pass. In an excited state these crystals align to block
light. Super-twisted crystals move from 180 to 270 degrees providing greater contrast than TN models.
TTL: Transistor-transistor logic applied to serial protocol. Low level is 0V while high logic is 5V.
10 Contact
Sales
Phone: 403.229.2737
Email: sales@matrixorbital.ca
Support
Phone: 403.204.3750
Email: support@matrixorbital.ca
Online
Purchasing: www.matrixorbital.com
Support: www.matrixorbital.ca
- Technical Manual 1
- Revision History 2
- Contents 3
- 1 Introduction 5
- 2 Quick Connect Guide 6
- 2.2 Standard Module 7
- C Connections 8
- 2.3 USB Module 9
- 3 Software 10
- 3.2 Application Notes 11
- 4 Hardware 12
- Power Through DB9 Jumper 13
- Protocol Select Jumpers 13
- 4.2 USB Model 14
- 4.3 Common Features 15
- 5 Troubleshooting 16
- 5.3 Communication 17
- 5.4 Manual Override 17
- 6 Commands 18
- 6.2 Text 19
- 6.3 Special Characters 21
- 6.4 General Purpose Output 24
- 6.5 Dallas One-Wire 25
- 6.6 Keypad 26
- 6.7 Display Functions 28
- 6.8 Data Security 29
- 6.9 Miscellaneous 30
- 7 Appendix 31
- 7.2 Character Sets 34
- 7.4 Electrical Tolerances 35
- 7.5 Optical Characteristics 35
- 7.6 Dimensional Drawings 36
- 8 Ordering 37
- 8.3 Accessories 38
- 9 Definitions 40
- 10 Contact 40
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