8 - 12 DS6878 Product Reference Guide
Hardware Handshaking
The data interface consists of an RS-232 port designed to operate either with or without the hardware handshaking
lines, Request to Send (RTS), and Clear to Send (CTS).
If Standard RTS/CTS handshaking is not selected, scan data is transmitted as it becomes available. If Standard
RTS/CTS handshaking is selected, scan data is transmitted according to the following sequence:
•
The digital scanner reads the CTS line for activity. If CTS is asserted, the digital scanner waits up to Host
Serial Response Time-out for the host to de-assert the CTS line. If, after Host Serial Response Time-out, the
CTS line is still asserted, the digital scanner sounds a transmit error, and any scanned data is lost.
•
When the CTS line is de-asserted, the digital scanner asserts the RTS line and waits up to Host Serial
Response Time-out for the host to assert CTS. When the host asserts CTS, data is transmitted. If, after Host
Serial Response Time-out, the CTS line is not asserted, the digital scanner sounds a transmit error, and
discards the data.
•
When data transmission is complete, the digital scanner de-asserts RTS 10 msec after sending the last
character.
•
The host should respond by negating CTS. The digital scanner checks for a de-asserted CTS upon the next
transmission of data.
During the transmission of data, the CTS line should be asserted. If CTS is de-asserted for more than 50 ms
between characters, the transmission is aborted, the digital scanner sounds a transmission error, and the data is
discarded.
If the above communication sequence fails, the digital scanner issues an error indication. In this case, the data is
lost and must be rescanned.
If Hardware Handshaking and Software Handshaking are both enabled, Hardware Handshaking takes
precedence.
NOTE
The DTR signal is jumpered to the active state.
Summary of Contents for Symbol DS6878
Page 1: ...DS6878 Product Reference Guide ...
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Page 3: ...DS6878 Product Reference Guide 72E 131700 03 Revision A January 2012 ...
Page 46: ...1 22 DS6878 Product Reference Guide ...
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Page 148: ...5 52 DS6878 Product Reference Guide ...
Page 187: ...USB Interface 7 19 USB Polling Interval continued 5 msec 6 msec 7 msec 8 msec 9 msec ...
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Page 417: ...Advanced Data Formatting 16 23 Numeric Keypad continued 7 8 9 Cancel ...
Page 463: ...Advanced Data Formatting 16 69 Send ALT Characters continued Send Alt Send Alt Send Alt ...
Page 484: ...16 90 DS6878 Product Reference Guide Alphanumeric Keyboard Space Single Quote Dash ...
Page 485: ...Advanced Data Formatting 16 91 Alphanumeric Keyboard continued Comma ...
Page 486: ...16 92 DS6878 Product Reference Guide Alphanumeric Keyboard continued ...
Page 487: ...Advanced Data Formatting 16 93 Alphanumeric Keyboard continued _ Underscore ...
Page 489: ...Advanced Data Formatting 16 95 Alphanumeric Keyboard continued 6 7 8 9 A B C ...
Page 490: ...16 96 DS6878 Product Reference Guide Alphanumeric Keyboard continued D E F G H I J ...
Page 491: ...Advanced Data Formatting 16 97 Alphanumeric Keyboard continued K L M N O P Q ...
Page 492: ...16 98 DS6878 Product Reference Guide Alphanumeric Keyboard continued R S T U V W X ...
Page 494: ...16 100 DS6878 Product Reference Guide Alphanumeric Keyboard continued d e f g h i j ...
Page 495: ...Advanced Data Formatting 16 101 Alphanumeric Keyboard continued k l m n o p q ...
Page 496: ...16 102 DS6878 Product Reference Guide Alphanumeric Keyboard continued r s t u v w x ...
Page 497: ...Advanced Data Formatting 16 103 Alphanumeric Keyboard continued y z ...
Page 498: ...16 104 DS6878 Product Reference Guide ...
Page 519: ...Driver s License Set Up DS6878 DL 17 21 Send Control H ...
Page 521: ...Driver s License Set Up DS6878 DL 17 23 Send Control P ...
Page 564: ...B 8 DS6878 Product Reference Guide ...
Page 565: ...Appendix C Sample Bar Codes Code 39 UPC EAN UPC A 100 123ABC 0 12345 67890 5 ...
Page 569: ...Sample Bar Codes C 5 Maxicode QR Code US Postnet UK Postal ...
Page 570: ...C 6 DS6878 Product Reference Guide ...
Page 571: ...Appendix D Numeric Bar Codes ...
Page 574: ...D 4 DS6878 Product Reference Guide ...
Page 575: ...Appendix E Alphanumeric Bar Codes Alphanumeric Keyboard Space ...
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Page 577: ...Alphanumeric Bar Codes E 3 Alphanumeric Keyboard continued ...
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Page 579: ...Alphanumeric Bar Codes E 5 Alphanumeric Keyboard continued _ ...
Page 581: ...Alphanumeric Bar Codes E 7 Alphanumeric Keyboard continued 6 7 8 9 End of Message Cancel ...
Page 582: ...E 8 DS6878 Product Reference Guide Alphanumeric Keyboard continued A B C D E F ...
Page 583: ...Alphanumeric Bar Codes E 9 Alphanumeric Keyboard continued G H I J K L ...
Page 584: ...E 10 DS6878 Product Reference Guide Alphanumeric Keyboard continued M N O P Q R ...
Page 585: ...Alphanumeric Bar Codes E 11 Alphanumeric Keyboard continued S T U V W X ...
Page 586: ...E 12 DS6878 Product Reference Guide Alphanumeric Keyboard continued Y Z a b c d ...
Page 587: ...Alphanumeric Bar Codes E 13 Alphanumeric Keyboard continued e f g h i j ...
Page 588: ...E 14 DS6878 Product Reference Guide Alphanumeric Keyboard continued k l m n o p ...
Page 589: ...Alphanumeric Bar Codes E 15 Alphanumeric Keyboard continued q r s t u v ...
Page 590: ...E 16 DS6878 Product Reference Guide Alphanumeric Keyboard continued w x y z ...
Page 591: ...Alphanumeric Bar Codes E 17 Alphanumeric Keyboard continued ...
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Page 616: ...Glossary 8 DS6878 Product Reference Guide ...
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