K1EL CW Processor/Keyer WinKeyer3 v30
WinKeyer3 IC Interface & Operation Manual 6/11/2017
Rev 1.2 Page 1
Introduction
This document will describe the K1EL WinKeyer3 (WK3) IC and its’ various interfaces. WK3 is a third
generation single chip Morse keyer IC. It is designed to attach to a PC’s USB port and provide accurate
transmitter keying for Windows based logging or other ham radio software packages. Due to timing
latency inherent in the multi-threaded Windows operating system, it is difficult for a PC to generate
accurately timed Morse. WK3 buffers ASCII characters sent by a Windows based software application.
It then translates them to Morse and directly keys a transmitter or transceiver. In addition, WK3 has a
paddle input allowing an operator to break in and send directly at any time. WK3 also provides a speed
potentiometer interface so that an operator can instantly dial any speed desired.
The host PC communicates to WK3 over a simple serial interface which can be a COM or USB port.
Letters to send, along with operational commands, are sent from the host to WK3 over the serial link. A
substantial feature list is provided allowing the user to precisely tailor WK3’s keying characteristics to a
particular transmitter. WK3 has a very low power requirement; in fact, it was originally designed to be
powered from a PC’s serial port. In standby it draws under a micro amp.
K1EL and several other manufactures sell products that utilize the WK3 IC, refer to the k1el website:
www.k1el.com
for further information. One popular kit is Hamcrafters WKUSB which includes a USB
interface, speed control, enclosure with pushbuttons, and an internal battery pack for standalone use.
Features
• 1200/9600 Baud Serial Rx/Tx Interface
• Iambic CW Paddle Interface
• Two Key Output Ports (high true TTL)
• Two PTT Output Ports: (high true TTL)
• 25 ma output sink/source
• Adjustable PTT lead in and tail delays
• Adjustable Speed 5-99 WPM
• Adjustable Weighting and dit/dah ratio
• Adjustable Farnsworth Character Spacing
• Adjustable Keying Compensation
• Autospace and Letterspace Control
• Sidetone output with adjustable frequency
• Standalone K14 Keyer Emulation
• Paddle only sidetone
• Custom configuration for two users
• Dit/Dah Memory Control
• Single Op Two Radio (SO2R) Support
• Adjustable Paddle Switchpoint
• Iambic A, B, Ultimatic & “Bug” modes
• Speed Pot Interface
• Adjustable speed pot range
• Embedded commands
• 160 character input buffer
• No crystals or oscillators
• 3.3 to 5 volt operation
• Current Draw: < 2 ma in active operation
• HSCW and QRSS Capability
• Automatic power down sleep mode
• Twelve stackable memory slots
• Stored Callsigns
Figure 1 – WinKeyer3 Package & Pinout
Pin 1 – Vcc (5.0 volts)
Pin 2 – Port 2 Key Output
Pin 3 – Port 2 PTT Output
Pin 4 – USB Connected Sense
Pin 5 – Serial Receive Input
Pin 6 – Serial Transmit Output
Pin 7 – Port 1 Key Output
Pin 8 – Sidetone
Pin 9 – Port 1 PTT Output
Pin 10 – Speed Pot Analog Input
Pin 11 – Right Paddle Input
Pin 12 – Left Paddle Input
Pin 13 – Switch Array Input
Pin 14 – Vss (Ground)
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9
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Winkeyer3
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2
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14
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510
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