SILITEK CORPORATION User Manual Keyboard Model : SK-2875 Version : 0.
CONTENTS 1. E.M.I. GUIDELINES 2. INTRODUCTION 3. OPERATION 3.1 USB Connection 3.2 Mode Indicators 3.3 Type Ahead Capability 3.4 Typematic Delay & Repeat Rate 3.5 Pseudo N-key Roll-over Capability 3.6 Diagnostic Test. 4. CABLE & CONNECTOR 5. TECHNICAL DATA 5.1 Electrical Characteristics 5.2 Mechanical Characteristics 5.3 Environmental Specificaitons 6. Block Diagram 7.
- Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help. Shielded interface cables must be used in order to comply with emission limits. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
OPERATION 3 3.1 USB Connection This keyboard is designed to USB connection. All data transfer follow USB protocol requirements. 3.2 Mode Indicators There are three LEDs on the keyboard to indicate ‘Caps Lock’, ‘Num Lock’ and ‘Scroll Lock’. The LEDs are 'toggled'. The first depression of the key turns on the LED. The second depression turns the LED off and so on. LEDs are off on power-up or software reset, but will flash during power-on initialization. 3.
CABLE AND CONNECTOR 4 The keyboard cable is a 6-ft. long cable. The keyboard cable is connected to the host unit through a USB connector. The following figure lists the connector pins and their signals. USB: Contact number Signal name Line color 1 2 3 4 GND +Data -Data VCC Black Green White Red TECHNICAL DATA USB Male Connector 1 2 5 5.1 Electrical Characteristic Input Power: +5 VDC, 50 mA max. Power Consumption: 0.25 watts max. 5.
