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8 - 12 PL3307 Decoder Integration Guide
Hardware Handshaking
The data interface consists of a serial 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 transmits as it becomes available. Select
Standard RTS/CTS handshaking to transmit scan data according to the following sequence:
•
The decoder reads the CTS line for activity. If CTS is asserted, the decoder waits up to the Host Serial
Response Time-out for the host to de-assert the CTS line. If, after the Host Serial Response Time-out
(default) the CTS line is still asserted, the decoder sounds a transmit error and discards any scanned
data.
•
When the CTS line is de-asserted, the decoder asserts the RTS line and waits up to the Host Serial
Response Time-out for the host to assert CTS. When the host asserts CTS, data transmits. If, after the
Host Serial Response Time-out (default) the CTS line is not asserted, the decoder sounds a transmit
error and discards the data.
•
When data transmission completes, the decoder de-asserts RTS 10 msec after sending the last
character.
•
The host responds by negating CTS. The decoder checks for a de-asserted CTS upon the next
transmission of data.
During data transmission, the CTS line should be asserted. If CTS is deasserted for more than 50 ms between
characters, the decoder aborts transmission, sounds a transmission error, and discards the data.
If the above communication sequence fails, the decoder 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.
•
None
: Scan this bar code to disable hardware handshaking.
•
Standard RTS/CTS
: Scan this bar code to select Standard RTS/CTS Hardware Handshaking.
•
RTS/CTS Option 1
: The decoder asserts RTS before transmitting and ignores the state of CTS. The
decoder de-asserts RTS when transmission completes.
•
RTS/CTS Option 2
: RTS is always high or low (user-programmed logic level). However, the decoder
waits for CTS to be asserted before transmitting data. If CTS is not asserted within Host Serial Response
Time-out (default), the decoder issues an error indication and discards the data.
•
RTS/CTS Option 3
: The decoder asserts RTS prior to any data transmission, regardless of the state of
CTS. The decoder waits up to Host Serial Response Time-out (default) for CTS to be asserted. If CTS is
not asserted during this time, the decoder issues an error indication and discards the data. The decoder
de-asserts RTS when transmission completes.
NOTE
The DTR signal is jumpered to the active state.
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Страница 3: ...PL3307 INTEGRATION GUIDE 72E 149624 01 Revision 11 September 2011 ...
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Страница 15: ...Table of Contents xiii Appendix E ASCII Character Sets Index ...
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Страница 42: ...3 2 PL3307 Decoder Integration Guide Figure 3 1 21 Pin ZIF Connector PL3307 Decoder to Flex Molex 54809 Series ...
Страница 43: ...Accessories 3 3 Figure 3 2 21 Pin ZIF Connector PL3307 Decoder to Flex Molex 54809 Series continued ...
Страница 44: ...3 4 PL3307 Decoder Integration Guide Figure 3 3 Imager Engine to PL3307 21 Pin Flex ...
Страница 47: ...Accessories 3 7 Figure 3 6 PL3307 30 Pin Host Connector Molex 52437 Series ...
Страница 48: ...3 8 PL3307 Decoder Integration Guide Figure 3 7 PL3307 30 Pin Host Connector Molex 52437 Series continued ...
Страница 49: ...Accessories 3 9 Figure 3 8 PL3300 microUSB Host Connector Molex 47346 Series ...
Страница 50: ...3 10 PL3307 Decoder Integration Guide Figure 3 9 30 Pin Vertical ZIF Connector on Host Molex 52559 Series ...
Страница 51: ...Accessories 3 11 Figure 3 10 30 Pin Vertical ZIF Connector on Host Molex 52559 Series continued ...
Страница 52: ...3 12 PL3307 Decoder Integration Guide ...
Страница 93: ...Imaging Preferences 5 9 Frame Rate continued 45 fps 07h 40 fps 08h 30 fps 02h 20 fps 09h 15 fps 03h 10 fps 04h ...
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Страница 175: ...Serial Interface 8 15 Software Handshaking continued None ACK NAK ENQ ACK NAK with ENQ XON XOFF ...
Страница 255: ...Symbologies 9 71 GS1 DataBar Limited Parameter F0h 53h Enable GS1 DataBar Limited 01h Disable GS1 DataBar Limited 00h ...
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Страница 298: ...B 8 PL3307 Decoder Integration Guide ...
Страница 299: ...APPENDIX C SAMPLE BAR CODES Code 39 UPC EAN UPC A 100 123ABC 0 12345 67890 5 ...
Страница 302: ...C 4 PL3307 Decoder Integration Guide QR Code US Postnet UK Postal ...
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