Matrix Orbital PK202-24-USB - Manual (Page 5)

1 Introduction
The PK202-24-USB is equipped with the following features;
•
20 column by 2 line text PLED display
•
Built in font with provision for up to 8 user defined characters
•
USB communication, or Serial TTL communication
•
Use of up to 100 modules on the same USB host
•
Fully buffered so that no delays in transmission are ever necessary
•
Ability to add a customized splash / start up screen
•
Use of "Remember" functions to save settings
•
Software controlled brightness with configurable time-out setting up to 90 minutes
•
Use of up to a 24 key keypad with a 10 key buffer
•
Three low power general purpose outputs for a variety of applications
•
Three high power general purpose outputs with RPM sensing and PWM control
•
Horizontal or vertical bar graphs
•
Medium digits capability
•
Power and data from one USB cable
•
A perfect fit to Matrix Orbital’s PC Bay inserts without any modifications
•
Dallas 1-wire bus that is capable of communicating with many devices over a single wire plus a ground
reference
1.1 What to Expect From the PK202-24-USB
The PK202-24-USB is designed as the display unit for an associated controller. The controller may be
anything from a single board, special purpose micro-controller to a PC, depending on the application. The
controller is responsible for what is displayed on the screen of the display.
The display provides a simple command structure which allows text and bar graphs to be displayed on
the screen. Text fonts are built in and use standard ASCII mapping. Provision is made for up to 8 user
defined characters.
The screen is backlit for low light situations. Backlighting may be turned on or off under program
control. Contrast is adjustable to compensate for differing lighting conditions and viewing angles.
General purpose outputs allow the controller to switch up to six electronic or electro-mechanical devices
by issuing commands to the display unit. These can be used for controlling LEDs, relays, etc.
1.2 What Not to Expect From the PK202-24-USB
The display does not include bitmap graphics capability, except that permitted by defining special char-
acters.
1.3 Keypad Interface
The keypad interface takes row / column input and converts it into ASCII characters, which are delivered
out the USB port to the associated controller.
Matrix Orbital PK202-24-USB 1